Type: Stable physical realities within Creation
Notable Example: The physical universe containing Kor Sirok
Physical universes are stable realities within Creation in which matter, energy, space, time, and living organisms behave according to persistent physical principles. Kor Sirok exists within one such universe, alongside Kua, the other planets of its star system, distant stars, and the physical space separating them.
Older planar traditions frequently describe this reality as the Material Plane. The term remains common in religious texts, magical instruction, and everyday speech, but modern planar scholars consider it misleading. There is no single Material Plane containing every physical world in Creation. Instead, multiple physical universes exist as distinct stable realities, each possessing its own physical space while sharing many of the fundamental principles that make material existence recognizable.
Within a physical universe, ordinary movement does not involve planar travel. A voyage from Kor Sirok to another planet in the Kua system would cross an enormous physical distance but would never enter The Verge. The same is true of travel between stars within the same universe. Planar transition occurs only when a traveler leaves one stable reality and begins establishing a relationship with another.
Other Physical Universes
Other physical universes exist within Creation but cannot be reached simply by traveling far enough through physical space. No amount of conventional travel through Kor Sirok’s universe eventually reaches the stars or worlds of another physical universe. The two realities are genuinely distinct even when their physical laws and inhabitants closely resemble one another.
Relationships between physical universes appear to be weaker and less common than many relationships between physical worlds and the Fundamental Realms or Reflective Realms. As a result, ordinary planar travel does not provide easy access between them. Rare magic such as Dream of the Blue Veil can establish a relationship between otherwise disconnected physical universes and allow passage from one to another.
Knowledge of other physical universes is extremely limited among the inhabitants of Kor Sirok. Most people have no reason to distinguish their universe from the older concept of the Material Plane, and even many educated spellcasters encounter the distinction only in advanced planar scholarship. Reliable accounts of travel between physical universes are rare enough that some scholars continue to dispute their interpretation.
Physical Universes and the Verge
A physical universe is a plane in the broadest scholarly sense: a stable expression of reality possessing its own coherent truths. What distinguishes physical universes from most other realms is the particular balance among matter, energy, space, time, and identity that allows ordinary physical existence to develop.
Travel from a physical universe into another realm occurs through The Verge just as travel between any other stable realities does. A journey toward Qorathun, Caelra, the Still Haven, or another plane gradually weakens the relationships characteristic of physical reality while strengthening those of the destination.
Physical universes nevertheless tend to possess broad relationships with many other kinds of planes. Stone, water, fire, living things, emotion, memory, divine influence, and other phenomena all occur within physical reality, creating numerous points of metaphysical correspondence. This helps explain why the Fundamental and Reflective Realms generally possess stronger relationships with physical universes than highly specialized divine realms do.
Kor Sirok and the Sundering
The Sundering did not weaken planar relationships throughout Creation universally. Its effects were concentrated on the metaphysical relationships between Kor Sirok’s physical universe and the wider planes, deliberately making transitions into and out of that universe substantially more difficult.
The Fundamental Realms and Reflective Realms remain comparatively accessible because their relationships with physical existence are unusually strong. Divine realms, whose realities are more heavily shaped by the nature and purposes of individual gods, became substantially harder to reach. Direct divine manifestation within Kor Sirok became all but impossible.
Other physical universes were not necessarily affected in the same way. Their relationships with the wider planes may differ substantially from those now experienced by travelers from Kor Sirok, although mortal scholars possess very little reliable information with which to compare them.
Mortal Models
The major Cosmological Models all tend to place the observer’s physical universe near the center, but they do so for different reasons. The Great Wheel uses that central position as the starting point from which increasingly specialized realms are compared, while the Turning Sphere places physical reality near the middle of a three-dimensional structure whose orientation can be freely rotated.
The Constellation Model is less committed to a geometric center, yet charts prepared on Kor Sirok still tend to make its physical universe one of the most prominent nodes because so many known planar relationships are described from that perspective. This emphasis should not be mistaken for evidence that Kor Sirok’s universe occupies the literal center of Creation.
A cosmological model prepared by inhabitants of another physical universe would almost certainly privilege their own universe in much the same way. The apparent centrality of physical reality is therefore partly a consequence of who is drawing the map and which relationships they are attempting to understand.