[@ASplashOfMusic] Well, check out all of the other powers already approved; 

[list][*] A guy who can alter physics, but by doing so, endangers his vital organs through a consistent deterioration by continuous use.
[*] A girl who can't die, but can feel everything to an extreme- in constant, agonizing pain.
[*] A woman who has complete mastery over her body, but also feels every ailment to an extreme.
[*] A dude whose body is filled with hellspawn.
[*] A woman who can create and manipulate fire, but alas, is not fireproof...
[*] A man who sheds bugs, but has also gone insane, because he sheds bugs.[/list]

All of the characters have a massive drawback to an otherwise awesome power. Don't be afraid to punish a character- it's fiction, after all.