If I could make a suggestion, what about Darkrai or Giratina-O (now hear me out on the last one! XD )? Darkrai, because he's known mainly for his nightmares, which would make someone's dream world "torn" in that way. Giratina-O would be because he guards the Distortion World (which is why I specified Origin Form, and not Altered Form), and one could say a distorted world is a "torn" world.