It's always the creepy little kids
"Get me the sugar!" called Jack's wife. His heart skipped a beat as he stood before the cabinet. Holding his breath, he slowly opened it.... Dangit! A baby!
What if when a character died and the price to bring him back into the world was to allow an evil or good version to be placed in the world with the sole purpose of killing the character that just got its life back? The copycat character would die apon completeing his mission.....or would he?