Demon

A Demon is the most powerful category of evil creature that is known. They are extremely rare and extremely dangerous and should never be faced alone. They are known to only serve themselves but apparently can be commanded by The Endless End.

Creation
Demons are born as a dark, evil, and insidious idea festering deep in the heart of a soul. This idea spreads to other souls and grows. It spreads though the hearts and minds of millions upon billions of creatures thoughout all of existence until it gains enough prominence to take a physical form. It usually takes over an already living body by devouring and destroying the soul, leaving it as a hollow shell for it to control and manipulate. Most Demons already exist and are millions and billions of years old, however currently have no physical form. They simply influence the worlds as an idea.

Destruction
There is no true way to kill a Demon, the closest you can hope is destroying it's physical form and sending it back to being a simple idea. While this may not seem like it matters, demons do a lot less harm as ideas than they can do as physical beings.

Origin
It is know Demons come from poweful evil ideas but it is unknown why or how. It is beleived it involved the ancient and extinct element of Malon and some of it's more powerful Wielders.

Known Demons who have taken physical form in the past
There are currently no know Demons currently in physical form, but it has happened in the past.
 * Zerrak: The Ice Demon of Murder
 * Balthazar-no-Tamehtah: The Abstract Demon of Hate
 * Lord Kahn: The Endless Demon of Pride
 * Nauumin:The Dark Demon of Fear