Board Thread:General Discussion/@comment-6192846-20130913170916/@comment-67.67.11.118-20140611232045

It may also be that it's because the child is also Carlos', and thus a combination of the two of them. The poison of the key seems to change potency depending on what it's mixed with. I imagine the same could be said of, say, eating a body with build up of the Key's poison in it.