Energy

Ethereal

The space between the inner planes is the Ethereal plane and it overlaps with the material and elemental planes.

Astral

All energy originates from the Astral plane, it flows through and creates the other planes. The source of magic flows somewhat like a cone, with the material planes inside it.

Shadow

Shadow space is not quite a plane but rather the absence of energy. It is infinite and endless.

Feywild, Shadowfell

These planes are the echos of the prime plane forming between the Astral and Shadow planes.

Material

Prime

The prime material plane is the center of all other planes, it exists as a combination of all the other elemental planes.

Elemental

The three elemental planes are Water, Earth, and Air.

Outer Planes

During the time between the breaking and before the war many demi-planes were created inside the ethereal plane in an attempt to create secondary prime planes. After the second breaking these planes continued grow.