@Christmas_Snow: That is reminscent of a Marvel Superheroes RPG character I created and played in 1988-89. Instead of shadows, he manipulated Darkforce. He started out as a good guy, but due to player group dynamics he/I became a villain. Instead of being a group playing with a gamemaster, it wound up me and another player versus the other five. Ken, the other player, and I killed them and ended the game and the group.