Intellectual History of Cosmology in Taelgar

This is a DM-facing reference to the development of cosmological thought in Taelgar. It describes the history of ideas, arguments, source traditions, and academic schools; it does not establish which account of the Multiverse is metaphysically correct.

The surviving chronology is uneven. Some works and thinkers have firm dates, some can only be placed relative to other works, and several major nonhuman traditions remain entirely undated. This note therefore distinguishes explicit influence from later comparison and avoids assigning dates solely to produce a tidy sequence.

Chronology at a Glance

Ancient world and before The Downfall. Hkaran, elven, dwarven, lizardfolk, and other nonhuman traditions describe planar travel, the journey of souls, elemental realms, and the structure of magic. Important surviving or fragmentary works include The Unstable Sphere, Journey of the Souls, Terrageum Virion, The Lay of Estar, The Song of the Eternal Earth, and The Endless Currents. The precise relationship among most of these traditions is unknown.
Drankorian Era, DR 1–1059. Drankorian scholars increasingly define, classify, and compare planar phenomena. On Metaphysics, Aetherium, and On the Classification of Divinity become foundational texts. Specialist societies and natural historians assemble empirical corpora on the elemental planes. Within the Arithrimos Lamperum, mathematical and cartographic work exists alongside initiatory allegory and speculation about exploiting the movement of souls as a magical force. Theophesus develops the idea of Echo Realms; Marcion of Iridel preserves older Limbo material and develops Chironides the Wanderer’s account of the Abyss; Lyrannis of Aquilona supplies the central argument for the traditional elemental model.
Late Drankorian synthesis, DR 900s. Gaius Devarro (DR 916–997), a founding figure in the Faculty of Metaphysics at the University of Chardon, synthesizes older Drankorian categories with Theophesus’s echo theory. His work becomes the principal foundation of the later Standard Multiversal Model.
After the Fall of Drankor, DR 1059–1542. Drankorian texts are copied, lost, excerpted, and reinterpreted across successor cultures. The period is intellectually important but poorly documented in the current vault. Airion the Mistspeaker develops an experimental account of compound elemental realms in the early DR 1500s. Ancient work by Thardrum Deepseeker is rediscovered shortly before the Great War.
Great War and Blood Years, DR 1542–1600. The war destroys scholars, archives, and institutions but also produces new evidence about planar incursions. Airion dies in DR 1545 and much of his work is scattered. Paulina Nusinius interprets the war’s aftermath through the temporary convergence of Limbo and the Material Plane. Ishara Venn begins the postwar study of elemental vortexes and planar connections.
Revision and competing schools, DR 1600s. Emyr of Tafolwern generalizes Ishara’s work into a theory of planar upwellings and attacks the hierarchy implicit in the Standard Model’s Echo Realms. Nicole Ardouin develops revisionist accounts of the Far Realms and Pandemonium. The University of Tollen emerges as an important center for work on marginal planes, planar contact, and theological cosmology.
Mathematical, experimental, and archival cosmology, DR 1700s. Harbek Ferrystone attempts to mathematize Emyr’s planar drift in DR 1703; his model gains predictive successes before being discredited in DR 1720. Arryn of Tollen publishes Experiments upon the Planar Substance in DR 1727. Ulfgar Frostbeard publishes The Lore of the Feywild in DR 1733, combining a revision of echo theory with an enormous antiquarian source collection. Current recovery of Airion’s work has reopened debate over the Energy Realms.

Principal Lines of Influence

An arrow indicates an influence or development stated in the source notes. “Parallel” indicates comparable ideas without an established historical connection.

Echo Realms and unified cosmology: Theophesus → Gaius Devarro → Standard Multiversal Model → criticism by Emyr of Tafolwern → related revisions by Ulfgar Frostbeard. Theophesus’s influence on Gaius is explicit. Emyr is an explicit critic of the resulting model. Ulfgar advances a later variant of the criticism, although direct dependence on Emyr has not been established.
Temporary planar connections: Ishara Venn and The Seams Between Worlds → Emyr of Tafolwern and On Hidden Doors → Harbek Ferrystone and Planar Tides in Relation to the Dangers of the Plaguelands. Emyr explicitly generalizes Ishara’s elemental vortexes; Harbek explicitly builds on Emyr’s planar drift.
Moral origin of the Abyss: Chironides the Wanderer → Marcion of Iridel and The Riven Veil. Chironides left no writing, making Marcion the principal scholarly source for their teaching. The Standard Model rejects this account in favor of an entropic counterpoint to Creation.
Far Realm revisionism: Thardrum Deepseeker → rediscovery before the Great War → Nicole Ardouin and The Exposition of the Alien Mind. Nicole develops the same rejection of “good” and “evil” as useful categories for alien minds, although her exact textual dependence on Thardrum is not stated.
Ley Lines and the Plane of Magic: Avariel → the terminology of Ley Lines → Gaius Devarro’s An Exploration of Magical Connections Between the Planes → later reinterpretation by the Standard Model and planar dualists. Avariel coined the term and Gaius later studied the phenomenon, but a direct personal or textual relationship is not established.
Traditional elemental classification: Lyrannis of Aquilona and On Elemental Forms + Julius Ceptuso → the traditional four- or five-energy model → challenge from Airion the Mistspeaker. Lyrannis provides the principal empirical argument for four pure elements; Julius popularizes the five-energy scheme that adds Magic. Their exact relationship remains unsettled.
Limbo studies: The Unstable Sphere → preservation by Marcion of Iridel; traveler traditions → Gaius Devarro and On Minds and Chaos; Great War evidence → Paulina Nusinius, Harbek Ferrystone, and Arryn of Tollen. This is a sequence of partially independent attempts using fragments, testimony, historical catastrophe, mathematics, and experiment rather than one continuous school.
Drankorian approaches to possibility: The Shape of Possibility and The Shape of Discovery offer contrasting accounts without an established relationship. The former treats possibilities as finite shapes susceptible to mathematical representation; the latter, perhaps parodically, treats curiosity as an irrational and unpredictable force that shapes possibility. Both are Drankorian, but shared authorship, influence, and direct debate are not established.
The Divine Veil: received theology of the journey of souls — challenged and reinterpreted by Yendalo and On the Power of Creation → Yendalism. The mature school logically belongs after the Standard Model became recognizable, but Yendalo’s own date remains unsettled. A possible indirect reference in On the Science and Possibilities of Soul Bindery might place him within or before the Drankorian Era, but both the accuracy of that reference and the identity of the metaphysicist it names are uncertain.

The Drankorian–Chardonian Academic Tradition

Foundational Drankorian classification

The most influential human academic tradition begins in the Drankorian Era. Its characteristic method is to gather accounts of planar phenomena, define stable categories, and arrange those categories into a single geometrical or historical model.

Several texts form its inherited substrate:

On Metaphysics is one of the earliest foundational works of extraplanar cosmology. It defines demiplanes broadly, calls the Dreamworld an echo of the Plane of Souls, and popularizes the term Shadowfolds.
Aetherium is the basis of the dominant view that the Ethereal Plane is an echo or extension of the Plane of Magic, increasingly dilute near other planes.
On the Classification of Divinity preserves or systematizes the distinction between Embodied Gods and Incorporeal Gods, a distinction later incorporated into the Standard Model’s account of the Divine Realms.
On the Nature of Extraplanar Travel records experiments showing that extraplanar weak points do not themselves make travel between planes easier. Its author and date are not established.
On the Creation and Destruction of Extra-Material Realms treated mutable realms in the Feywild and Shadowfolds. It is now lost except for fragments preserved alongside commentary on A Fool’s Fortune.

Drankorian scholarship was not purely theoretical. The Occulta Ludum produced Studies of the Aerial Sphere from first-hand reports of travel in the Elemental Plane of Air. The Concordia Pyrae compiled the Compendium of Fire. Leandros of Drankor assembled a natural history of the Elemental Plane of Water in On the Mysteries of the Infinite Depths, while Lyrannis of Aquilona compared elemental creatures across several planes in On Elemental Forms. The Arithrimos Lamperum combined metaphysics, mathematics, and the cataloging of planar connections in works such as The Shape of Possibility and Brilliant Numbers.

The Arithrimos corpus was methodologically broader than these mathematical works alone suggest. Allegories for the Initiated communicated the order’s secrets through short fairy tales and riddles intended for readers who already knew how to interpret them. On the Science and Possibilities of Soul Bindery, attributed to an early member, treated the movement of souls as a force that could be bound and exploited for magical engineering.

The wider Drankorian corpus also includes The Shape of Discovery, a brief and possibly parodic argument that curiosity shapes possibility precisely because curiosity is irrational and unpredictable. This forms a conceptual contrast with the mathematical possibility described in The Shape of Possibility, but no connection between the two works is established.

The dates and order of most of these works within the Drankorian Era are not yet established. They should normally be treated as a broad classical corpus rather than as a precise sequence.

Theophesus and Gaius Devarro

Theophesus first made physical correspondence central to the study of the Feywild. From early comparative maps, he argued that mountains, forests, and other features of the Material Plane tend to have analogues in the Feywild. He later extended the analogy to the Dreamworld and Plane of Souls.

Gaius Devarro, writing in the DR 900s, combined this theory with the older Drankorian category of Demiplanes. He proposed that the Riving left persistent resonances among the planes: some became permanent and co-extensive Echo Realms, some became limited domains such as the Shadowfolds, and some could be shaped temporarily by magic. This synthesis became the foundation for the Standard Multiversal Model.

Gaius also represents the breadth of the early Faculty of Metaphysics. On Minds and Chaos assembled testimony about Limbo, while An Exploration of Magical Connections Between the Planes cataloged accounts of Ley Lines and magically disrupted regions. His work therefore joined classification, textual collection, and empirical anomaly rather than relying on a single method.

The Standard Multiversal Model

The Standard Model is best understood as a mature Chardonian synthesis, not a single book written at one moment. In its usual form it recognizes Fundamental Planes, Energy Realms, Spiritual Realms, and Echo Realms. Gaius is its principal intellectual ancestor, but later scholars supplied important pieces of its received form:

Aetherium underpins its relation between the Ethereal Plane and Plane of Magic.
Theophesus and Gaius underpin its Echo Realms.
On the Classification of Divinity underpins much of its theological vocabulary.
Lyrannis of Aquilona and Julius Ceptuso underpin the traditional account of elemental energies.
Later teaching by the Faculty of Metaphysics regularized these materials into the standard fourfold classification.

The model’s dominance is institutional rather than universal. It is the working language of the University of Chardon and an effective common vocabulary for planar scholarship, but nearly every major category within it is contested.

Rival Models of the Whole Multiverse

Emyr’s four complete realms

Emyr of Tafolwern argued that the Standard Model’s language of “echo” assumes without proof that one plane is primary and another derivative. He treated the Material Plane, Feywild, Plane of Souls, and Dreamworld as four complete central realms: physical, magical, spiritual, and imaginary. Limited domains such as Shadowfolds and temporary demiplanes could still be derivative without reducing the Feywild or Dreamworld to reflections.

Emyr is also important because his criticism joins cosmological structure to planar geography. His work on temporary connections gave him reason to think in terms of moving relationships rather than a fixed diagram.

Ulfgar’s material–soul–magic triad

Ulfgar Frostbeard advances a related but distinct criticism in The Lore of the Feywild. He treats the Feywild, Material Plane, and Plane of Souls as a linked triad of magical, material, and mental or spiritual reality. His argument is notable less for new travel than for its enormous antiquarian base: the book gathers elven poetry, Drankorian fragments, Deno’qai tradition, giant mysticism, travelers’ tales, and folklore.

Ulfgar is therefore both a theorist and a historian of sources. His work demonstrates how lost or non-academic traditions can be absorbed into Chardonian scholarship, but its collection has a strong Chardonian bias.

Planar Dualism

Planar Dualism treats the Astral Plane and Ethereal Plane as the only truly fundamental planes. The Plane of Souls, Land of the Dead, and Plane of Creation become regions of differing density within the Astral; the Plane of Magic becomes the deepest region of the Ethereal.

The school’s founder, date, and principal texts have not been established. Its greatest influence may be metaphorical rather than doctrinal. Even scholars who reject dualism use its images of seas, currents, rivers, and flows to discuss Ley Lines and planar weak points.

Yendalism

Yendalism divides reality according to its relationship to the Divine Veil, producing the Inner Realms and Outer Realms. Yendalo rejects elaborate taxonomies that treat named subdivisions as proof of metaphysical difference. His alternative asks what realms sustain, separate, connect, and draw toward themselves.

This disagreement is also epistemological. Yendalo treats contemplation, meditation, and mystical vision as disciplined methods of inquiry alongside careful reasoning. His conflict is therefore primarily with the dominant methods of human academic wizardry.

Yendalo’s historical date is unknown. On the Science and Possibilities of Soul Bindery, attributed to an early member of the Arithrimos Lamperum and dated broadly to the Drankorian Era, cites Eucaustis’s story that Yendalo once met someone who escaped from a soul hoard. If this reference is accurate and names the same Yendalo, it requires him to predate the treatise.

This evidence is explicitly provisional. The Yendalo reference may be an error in the current book note, and the treatise may actually refer to a different, earlier metaphysicist. Until the underlying reference is resolved, it should not be used to fix Yendalo’s date or to establish a direct relationship between Yendalism and the Arithrimos Lamperum.

Avariel’s multidimensional web

Avariel proposed that the Plane of Magic exists in a higher dimension than ordinary planar geometry can represent. Its apparent contact with every studied plane is therefore not a collection of local proximities but a web extending through the entire multiverse. Her theory remains one of the principal alternatives to planar dualist accounts of magic.

Avariel coined the term Ley Lines, but her date and relationship to Drankorian or Chardonian institutions are unknown.

The Elemental and Energy-Realm Traditions

Traditional four- and five-energy models

The dominant human academic account recognizes Earth, Air, Fire, and Water as the pure elemental energies. Lyrannis of Aquilona supplied its strongest empirical argument: in On Elemental Forms, she found that beings of pure elemental essence overwhelmingly belong to those four categories. Julius Ceptuso later popularized a five-energy scheme that included Magic.

The exact order of Lyrannis and Julius is not firmly established. A comment on Julius’s note tentatively places him after Gaius and before the Great War, but this should not yet be treated as fixed chronology.

Specialist and experiential traditions

Several bodies of evidence never became complete multiversal models but deeply shaped knowledge of particular planes:

The Lay of Estar preserves an ancient elven account of the discovery and naming of the elemental planes.
The Song of the Eternal Earth is a dwarven description of the Plane of Earth.
Studies of the Aerial Sphere, the Compendium of Fire, On the Mysteries of the Infinite Depths, Into the Abyss, and The Siren’s Embrace preserve Drankorian reports and literary images of the principal elemental realms.
Khevaris Stoneweaver studied portals associated with the Plane of Earth, but his date and writings are not established.
Balrik Frostbeard collected reports that shape current geographical knowledge of the Plane of Earth; his date and relationship to Ulfgar remain unsettled.

Dwarven sevenfold cosmology

Dwarven metaphysicists preserve a seven-energy model associated with the roles of the Firstborn: Spirit, Magic, Earth, Air, Fire, Water, and Metal. Spirit is associated with the Heart of the Mountain and the other six with Energy Realms, implying an Elemental Plane of Metal.

This tradition is not merely a variant of the Chardonian model. It joins social, religious, and elemental order. Human academics often reinterpret its Plane of Metal as a region of the Plane of Earth or as one of Airion’s compound realms.

Aznoké and the Eightfold Essences

The lizardfolk mystic Aznoké, in The Endless Currents, describes physical energies (Fire, Air, Earth, Water), fundamental energies (Magic and Spirit), and cyclical energies (Life and Death). The Plane of Blossoming Currents and Plane of Still Waters are stages in a cycle of vitality, cleansing, death, and renewal, not simply two additional entries in a planar catalog.

Later Faculty scholars have translated these images into hypotheses about positive and negative Energy Realms. That interpretation may not preserve Aznoké’s original way of thinking. Her date is deliberately unsettled.

Airion’s compound realms

Airion the Mistspeaker argued in The Codex of Compound Planes that careful planar experimentation revealed secondary elemental energies and at least eight compound realms. His system challenges the claim that apparently mixed regions are merely borderlands within the four traditional elemental planes.

Airion died during the Great War, and much of his work was lost during the Blood Years. Its recent recovery by the Great Library means that a prewar theory has only now become a major modern controversy.

Planar Connections, Weak Points, and Planar Geography

This strand developed from the practical problem that “connection” describes several different phenomena.

Classical foundations

On Metaphysics supplied early language for impossible planar geometry, while On the Nature of Extraplanar Travel established that extraplanar weak points do not automatically facilitate crossing. The Arithrimos Lamperum cataloged weak points and encoded locations through brilliant numbers. Avariel interpreted many connections as scars or remnants of the Riving and treated Ley Lines as contact with the Plane of Magic.

In the DR 900s, Gaius Devarro collected evidence for places where Ley Lines were disrupted or absent. His imagery of “thin walls” became influential even though later scholars disagree about whether proximity is genuinely geometric.

From Ishara to Emyr

Ishara Venn treated elemental vortexes as temporary loci where a nearly pure elemental expression draws a corresponding plane close to the Material Plane. In The Seams Between Worlds, she attempted to systematize these events.

Emyr of Tafolwern broadened Ishara’s theory in On Hidden Doors. His “planar upwellings” included elemental vortexes, unpredictable fey crossings, and the appearance or disappearance of portals. He added planar drift: the relative relationship among planes changes over time.

Harbek’s mathematical turn

Harbek Ferrystone transformed Emyr’s planar drift into a quantitative theory of drift, tides, and flows. Planar Tides in Relation to the Dangers of the Plaguelands successfully predicted some dangerous periods, including a vulnerability in DR 1709, but failed dramatically when the War of the Ashen Horde began in DR 1720 during a predicted period of weak Limbo influence.

The failure discredited Harbek’s model, not necessarily the more general idea of planar drift. His work remains the most developed attempt to make planar relations predictively mathematical.

Current View

The current distinction among extraplanar weak points, temporary vortexes or upwellings, and actual portals is primarily an organizational framework recorded in Planar Connections. It should not automatically be attributed to one in-world scholar:

Weak points transmit planar influence but do not permit or ease travel.
Vortexes or upwellings are temporary, often unpredictable connections that can transport creatures.
Portals are stable or magically created passages through which one can intentionally cross.

Souls, Death, and Theological Cosmology

Received journey-of-souls traditions

The journey of the dead predates formal Chardonian cosmology. The pre-Downfall Hkaran text Journey of the Souls describes passage from the Material Plane through the Plane of Souls to the Land of the Dead, where gods or demons claim souls. The Song of the Shattered, Reborn supplies the most famous literary image of the Land of the Dead as a gray shore whose ground flows toward a distant destination.

The existence of the five-volume Journey of the Souls: A Refutation establishes at least one extended critical response to the Hkaran text, but little else. Its author, date, arguments, circulation, and influence are unknown. It remains an open question whether the refutation was a minor and forgotten work, one contribution to a limited debate, or evidence for a major scholarly tradition of criticism.

Mos Numenan theology treats the Plane of Souls as the connection between material life and divine Creation. Blossom of the Eightfold Light is an important ancient poetic source for the Divine Presence, Plane of Creation, and Eight Divines. Dwarven works such as the Iron Verses and Tome of Hammer and Stone describe the Heart of the Mountain and the divine locus of the Bahrazel.

Classification of divinity

On the Classification of Divinity helped transmit the distinction between Embodied and Incorporeal Gods into later theological cosmology. The Standard Model uses this distinction when discussing Divine Realms, while remaining largely noncommittal about the origins of many individual Spiritual Realms.

Applied soul metaphysics and bindery

On the Science and Possibilities of Soul Bindery represents an applied Drankorian approach to the passage of souls. Its author argues that a soul’s movement after death creates a magical force or pressure that can be captured by preventing the soul from reaching its destination. The treatise presents lich-forms as only the most basic application and proposes golems, automata, ships, and weapons powered by bound souls.

This is neither simply a description of the afterlife nor a classification of planes. It treats a disputed account of soul movement as a basis for magical engineering. The work’s indirect reference to Yendalo concerns an escape from a soul hoard rather than Yendalo’s cosmological doctrines, so it does not by itself establish intellectual influence in either direction.

Competing accounts of souls and Creation

Standard theological cosmology treats the Material Plane and Plane of Souls as a central pair, with the Land of the Dead mediating passage toward the Divine Realms and Plane of Creation.
Planar Dualism makes these regions or densities within the Astral Plane.
Camilla of Drankor records a fey tradition in which the Plane of Souls is a pale echo of the more vivid Dreamworld, reversing the usual human hierarchy.
Yendalo makes the Divine Veil the central division of the cosmos and interprets the motion of souls as Soulstuff diffusing toward Creation.
Heloise of Tollen, in a still-undated modern mathematical study, argues that the Plane of Creation may be an infinitely dense mass of Soulstuff inaccessible to anything except the Divine Presence.
Aznoké treats life and death as cyclical currents rather than a one-way geometrical ascent.

Cosmology of Dangerous and Marginal Planes

Limbo

Limbo scholarship repeatedly returns to the problem that ordinary descriptions and classifications fail there.

The Unstable Sphere, a pre-Downfall Hkaran work of uncertain ultimate origin, debated whether Limbo’s instability lay in geometry or the ceaseless transformation of substance.
Marcion of Iridel preserved important fragments of that lost text.
Gaius Devarro collected poems, testimony, and traveler accounts in On Minds and Chaos, emphasizing both unstable substance and the power of concentration.
Paulina Nusinius, writing after the Great War, argued that Cha’mutte was in some sense part of Limbo and that the plane briefly collapsed into the Material Plane at his death.
Harbek Ferrystone treated Limbo’s influence on the Plaguelands as a measurable tide.
Arryn of Tollen used Great War testimony and practical experiment in Experiments upon the Planar Substance, developing principles in which will, attention, movement, and transformation determine local reality.

Yendalo stands partly outside this sequence, describing Limbo as a shifting wound in reality. His historical relationship to the other writers is unknown.

The Abyss

The principal dispute concerns origin rather than geography.

Upon the Fractured Earth provides ancient empirical testimony about the lasting corruption caused by Abyssal portals.
The Chronicle of Ruin is the largest descriptive collection of Abyssal tales.
Chironides the Wanderer argued that human preaching of damnation helped shape the Abyss from Soulstuff.
Marcion of Iridel developed that claim in The Riven Veil.
The Standard Model instead treats the Abyss as an entropic counterpoint or backlash against Creation.
Yendalo’s surviving moral language about cruelty cracking the Divine Veil resembles Marcion’s emphasis on mortal wrongdoing, but no direct influence is established.

Far Realms

The infamous Zhâruk Akhâl dominates the reputation of Far Realm study as inherently maddening. Thardrum Deepseeker nevertheless argued that not every Far Realm need be evil. His work was rediscovered in Isingue before the Great War.

Nicole Ardouin revived or independently developed this position in The Exposition of the Alien Mind, arguing that good and evil are inadequate categories for truly alien minds and that communication might produce new knowledge. Her disappearance on an expedition helped keep the school marginal.

Pandemonium and the Nightmare Realm

Codex Maledictum gathers contradictory traveler accounts of Pandemonium. Nicole Ardouin’s On the Foundations of Madness instead uses fragments, theology, and the plane’s apparent association with lycanthropy to argue that Pandemonium may be a Divine Realm of the embodied god called the Mad One. This challenges the Standard Model’s decision to leave Pandemonium among undifferentiated Spiritual Realms.

Nicole also studied the Nightmare Realm, although a full account of that work has not yet been developed. Camilla of Drankor preserves an older fey tradition concerning the same realm.

Mirror Realm

On the Nature of Reflections and Transitive Magic is the largest body of speculation about the Mirror Realm, but its author and date are unknown. Arryn of Tollen later experimented with the realm and became trapped there, demonstrating that speculative cosmology can become practical planar research without establishing that Arryn authored the older treatise.

Feywild and Dreamworld Source Traditions

The intellectual history of the Feywild is unusually dependent on literature, oral tradition, and travelers’ accounts.

Terrageum Virion, already ancient before the Downfall, is among the earliest known geographical treatments.
Theophesus turned comparative maps into a theory of physical correspondence.
Camilla of Drankor preserved fey accounts of the Dreamworld, Plane of Souls, Shadowfolds, and Nightmare Realm.
On the Creation and Destruction of Extra-Material Realms treated the formation and collapse of mutable domains but now survives only in fragments.
The letters of Saria provide a major experiential source for temporal distortion in the Feywild. Her date is not established.
Emyr of Tafolwern rejected the claim that the Feywild is secondary to the Material Plane.
The Lore of the Feywild assembled the largest modern corpus, including material from Calenya, Eukos the Wanderer, Breda Mistweaver, The Tales of Ma’qaar, Terrageum Virion, and Drankorian literature.

Literary works such as A Fool’s Fortune, A Court of Whispers, Curse of the Thorned Feast, and Light of the Everglade are important evidence within this tradition even though they are not formal cosmological arguments.

Popular, Artistic, and Legendary Reception

Cosmological knowledge also circulates outside formal scholarship. These sources rarely establish schools of thought, but they shape which images and questions later scholars inherit.

Kauno the Mariner appears in Skaer legends of travel into an uncanny sea generally identified by scholars with the Elemental Plane of Water.
Aveline of Isingue is known for a prominent artistic representation of the Abyss, illustrating how speculative cosmology enters visual culture even when direct travel accounts are distrusted.
Verdant Canticles supplies some of the most vivid elven descriptions of Arborea.
Plays, poems, songs, travelers’ tales, and accounts of resurrection are repeatedly used as cosmological evidence. The distinction between “literature” and “observation” is therefore often an academic judgment imposed after the fact.

Methods and Institutions

Classification and synthesis

The classical Drankorian and Chardonian method seeks stable categories and a unified diagram. Its institutional center is the Faculty of Metaphysics at the University of Chardon. The Standard Model is its greatest success and its most frequent target.

Planar travel and experiment

The Occulta Ludum, Concordia Pyrae, Lyrannis, Airion, Ishara, and Arryn represent different forms of empirical cosmology. Their evidence includes direct travel, conjuration and binding, experimental magic, observations of native beings, and records of planar incursions.

Antiquarian and comparative scholarship

Gaius, Marcion, Nicole, and Ulfgar all depend heavily on collecting damaged texts, oral traditions, and conflicting testimony. Their compilations sometimes preserve ideas far older than the works in which modern scholars encounter them.

Mathematics

The Arithrimos Lamperum, Harbek Ferrystone, and Heloise of Tollen all combine mathematics with metaphysics. No direct intellectual lineage among them has been established. The resemblance should remain a recurring method rather than a single mathematical school unless future notes connect them.

Initiatory and allegorical instruction

Allegories for the Initiated shows that the Arithrimos Lamperum also used restricted stories and riddles to communicate knowledge within the order. This complicates an account of the society based only on mathematics, maps, and formal treatises. Because the allegories were intended for readers who already understood their meanings, and those interpretations are not preserved, they are evidence for a method of instruction rather than reliable evidence for any particular doctrine.

Mystical and contemplative knowledge

Yendalo and Aznoké most clearly represent cosmologies in which disciplined contemplation, vision, poetic image, and spiritual practice are genuine modes of knowledge. Fey, dwarven, lizardfolk, and religious sources frequently resist translation into the classificatory vocabulary of human universities.

This is a major intellectual fault line. Academic scholars often treat poems and visions as evidence to be decoded into planar categories, while the originating traditions may treat the images, cycles, and relationships themselves as the cosmology.

Preservation and recovery

The Fall of Drankor and the Great War repeatedly broke intellectual continuity. Consequently, the date of an idea’s composition and the date of its scholarly influence may be very different. Airion is the clearest example: his theory belongs to the early DR 1500s, but its influence on current elemental debate follows recent recovery by the Great Library. Ulfgar’s work similarly gives ancient sources a new modern audience.

Source Corpus by Topic

This list distinguishes formal arguments from the narrative, religious, and visual sources that later cosmologists use as evidence.

General structure and transitive planes

On Metaphysics, Aetherium, Standard Multiversal Model, Planar Dualism, Yendalism, and On the Power of Creation.
The Shape of Possibility and Brilliant Numbers for Drankorian mathematical metaphysics; The Shape of Discovery as a contrasting, possibly parodic account of curiosity and possibility.
Allegories for the Initiated for the initiatory and allegorical methods of the Arithrimos Lamperum; the doctrines encoded in its stories are unknown.
The Runes of Creation for a practical theory of how runic structures shape extraplanar energy; it is not yet integrated into a named cosmological school.

Chronological and Intellectual Questions Still Open

When did Avariel, Aznoké, Yendalo, Saria, Khevaris Stoneweaver, and Thardrum Deepseeker live?
Does On the Science and Possibilities of Soul Bindery correctly refer to the same Yendalo whose teachings became Yendalism, or is the reference an error in the current book note or a reference to a different, earlier metaphysicist?
Who wrote Journey of the Souls: A Refutation, when and where did it circulate, what did it argue, and was it a minor forgotten work, part of a limited debate, or evidence for a major scholarly tradition?
Which foundational Drankorian works belong to the early empire, the Golden Age, or the final centuries before the Fall?
What relationship, if any, exists between The Shape of Possibility and The Shape of Discovery?
What doctrines were encoded in Allegories for the Initiated, and how did this allegorical instruction relate to the mathematical and empirical work of the Arithrimos Lamperum?
How representative was On the Science and Possibilities of Soul Bindery of the Arithrimos Lamperum, and were any of its proposed applications ever realized?
What is the precise relationship between On Metaphysics, Theophesus’s work, and Gaius’s synthesis?
Did Julius Ceptuso directly build on Lyrannis, and when did the five-energy model become standard teaching?
Who founded Planar Dualism, and did it arise before or after the mature Standard Model?
Is Ulfgar directly indebted to Emyr, or are their criticisms independent responses to the same weakness in echo theory?
Did Nicole Ardouin explicitly read Thardrum, or did the rediscovered work merely create the context in which her similar argument became possible?
Are the mathematical approaches of the Arithrimos Lamperum, Harbek Ferrystone, and Heloise of Tollen historically connected?
How did the University of Chardon preserve and regularize Drankorian scholarship between the Fall of Drankor and the Great War?
What bodies of Stoneborn, dwarven, elven, lizardfolk, fey, and other nonhuman scholarship exist outside the fragments translated or cataloged by human institutions?

These gaps are useful places for later worldbuilding. Until they are resolved, parallel traditions should remain parallel rather than being forced into a single lineage.