Cool!  I'm considering having my character's power be something like Odynokinesis, or the power to manipulate pain. http://powerlisting.wikia.com/wiki/Pain_Manipulation
Would that be too OP, or would it be ok?  I figure he could remove his ability to feel pain, so the beatings and stuff don't effect him mentally, but he can also force that pain onto others, causing the guards to cry out in agony as he relishes in their screams.  I'm thinking really sadistic here, seems like something that would be fun to play.  But if you think that's too OP, I can think of something else.