Plane

A plane or plane of existence is a "world" or universe with its own properties and physical and metaphysical laws. They exist in the multiverse.

Many planes, though not all, are divided into layers, which can be thought of as sub-planes. The Nine Hells, as you can imagine, has nine layers, whereas Marillia has only one.

Cosmological models

Scholars have formulated various cosmological models in an effort to model the structure of the multiverse. The dominant model is the Great Wheel.

Known planes

• The Abyss: An endless pit of darkness and chaos
• The astral plane
• Carceri, the Red Prison
• Celestia
• The Elemental Plane of Air
• The Elemental Plane of Fire
• The Forgotten Realms
• Hades: The world of the dead
• Hesperia, also known as Fairyland
• Lys: A blissful realm
• Marillia: YOU ARE HERE
• The Nine Hells
• Ravnica