[Gallagher]

It'll take ages for it to become too much. As it is, IF something is bad enough to kill him, he WILL die. He can't change quick enough to stop that. He has next to no work with poisons and venoms, and frankly, some are so dangerous that he pretty much has no hope of getting full immunity from without death. Plus, he does age (though more slowly) because it's a natural thing, not real trauma. And his skin gets tougher more quickly than his internal organs, so after a point? If he gets some kinda internal bleeding going on, hospital won't have good enough equipment to cut him open and take care of the problem.

... Bl These boys need more practice in actual fighting and stuff, not just HERP DERP I'MMA HELP PEEPS!