[quote=@Unknown100]
<Snipped quote by Shard>


Damn, I think I have a similar idea that would now seem less original :p 


Edit: Hmm, then again maybe demons in humans is part of the universe. It gets reinforced by more than one character having it.
[/quote]

So, my idea is that my character puts on a bracelet which contains a demon. When he puts it on, the demon fuses with the character's soul, and they begin having a symbiotic relationship. They keep each other alive. If they somehow get separated, they would both die.

The demon would provide the kid with specific powers, and the kid would keep the demon alive. There is a pact price too, of course. Since the kid was dying from an illness, this kind of cures him, but forever binds him to a demon who hangs around. Forever. The pact price is the kid's time, which takes away his ability to age, cause' the demon don't want to die. Aka, they keep each other alive.