New champion idea

So this few week i've been a new manga, the name is yakushoku distpiari just for information, and the main character of the book gave a idea for a new champion. In the book, the character can become stronger the more of allies who'se dead. So i thought about a champion with the same abilities, the more of his allies are dead, stronger he become. I know this could be Op or it could make some troll but i just giving this idea because it could good and game-breaker in a game.

Leave comment about this and if you any other idea.