Demonic Power

Demonic Power is one of the four fundamental types of energy that mortals may manipulate.

Particularities
Demonic Energy is very different from other types in that it originates exclusively from Demons. Only through absorbing a demon's power via Enslavement can a demonic mage use this energy. The power is then stored inside an object, usually made of bone, and can be used later.

It never regenerates normally in any other way.

Uses
Demonic magic, at its core, is like a force of death. It kills, destroys, and causes pain and disease. Thus, it is extremely powerful for offensive, and destructive purposes. Killing things with demonic energy is quite easy, but it can prove to be quite difficult to do other things.

As a result, demonic magic is the least versatile type of magic.

Another way to use demonic magic is to summon demons themselves to do the fighting in the user's stead.