The Inner Planes
The Inner Planes are the elemental foundations of the multiverse, comprising the four great realms of Air, Earth, Fire, and Water. In each, one element exists in its purest and most dominant form: open sky in Air, vast stone depths in Earth, endless oceans in Water, and ever-burning flame in Fire. Together, these planes provide much of the physical substance that shapes the Prime Material Plane.
Where neighboring Elemental Planes meet, their substances begin to overlap and intermingle. These unstable confluences are collectively known as the Elemental Chaos, producing regions where elements combine in different forms, such as magma where Fire meets Earth or ice where Water meets Air. These regions belong to the boundaries between the Elemental Planes rather than existing as planes in their own right.
Most of the Inner Planes are hostile to mortal life, though they are home to elemental beings and other creatures adapted to their conditions. Farther into each plane, its dominant element generally becomes more intense and less accommodating to outsiders, while its boundaries can give way to increasingly turbulent mixtures of elemental matter.
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The Elemental Plane of Air
The Elemental Plane of Air is one of the four Inner Planes and the elemental source most closely associated with wind, storms, clouds, and open sky. Most of the plane consists of open air without permanent ground, horizon, or surface....
The Elemental Plane of Earth
The Elemental Plane of Earth is one of the four Inner Planes and the elemental source most closely associated with stone, soil, metal, crystal, and mineral matter. Much of the plane consists of solid earth rather than open terrain. Caverns,...
The Elemental Plane of Fire
The Elemental Plane of Fire is one of the four Inner Planes and the elemental source most closely associated with flame, heat, and combustion. Fire exists throughout the plane without requiring ordinary fuel. Its more accessible regions contain solid ground,...
The Elemental Plane of Water
The Elemental Plane of Water is one of the four Inner Planes and the elemental source most closely associated with water, currents, tides, and aquatic environments. The plane is an immense body of water with no known surface or floor....