The Otherworld

The Otherworld is a demon realm, it is a plane adjacent to the mortal realm that is the source of all magical energy.

Demons populate the Otherworld. For a sorcerer to be able to draw magical energy from the Otherworld, there must be a connection established by a demonic bargain, as humans cannot draw energy from the Otherworld on their own. Demons crave mortal life, and they will bargain with humans over it.

Anything that comes from the Otherworld can't be killed in the mortal realm, it just banishes back home. The spirits of demons live on after their bodies are destroyed.

Description
The Otherworld has a sunless sky, and forests where beasts roam.

Lesser demons
They are abundant in the Otherworld, and are the lowest subjects of demonic society, ruled by highborn demons. Lesser demons are not difficult to summon, but they don't make reliable servants as they are not very intelligent. Lesser demons are illegal to summon as of the Reforms
 * Imps
 * Fiends: They are sometimes kept as hunting pets by highborn demons.
 * Goblins

Highborn demons
True sorcerers seek only the service of highborn demons, which are dangerous to summon. When they have a master they are compeled to obey the orders given and are bound to the conditions of their bargain. Known highborn demons:
 * Silas: A notorious highborn demon in the Otherworld
 * Lorelei

Archon
The Archon rules the Otherworld, and all the highborn demons.

Trivia

 * Cornelius the Wise claimed to have entered the Otherworld
 * Prendergast devoted his life to the study of demons and the Otherworld.
 * Iron is one of the few things capable of banishing a demon back to the Otherworld.
 * The language spoken by demons in the Otherworld is called Enochian.