(Quite a bit, he can't do it instantly and he can only phase in a straight line so moving to where he will reform will get whatever it is stuck in him thus hurtng him, that ripping it out is killing him, and he can't pass through objects with a thickness greater than five feet, else he gets stuck inside and is crushed) aichi crashed into the room below, hilding the hole in his chest where his left lung once was and tried to gaspe for breath, his vision going dark, "thank god for adrenaline but I wish it would heal not just erase pain...god.... his head slunk down "sorry captain, thought I could help you out..."