dirty deeds done dirt cheap
Stand power of Funny Valentine from Steel Ball Run. Usually abbreviated as D4C due to its long name. Manifests as a white/pink humanoid with large "horns" resembling rabbit ears.
Grants Valentine the power to travel to parallel worlds, even being able to bring people across with him. Should something or somebody from one world meet their counterpart in another, they will be both be destroyed. Valentine is immune to this effect, and can change places with a "parallel" Valentine should he come close to dying, with all memories transferring over.
Namesake is the song and album Dirty Deeds Done Dirt Cheap by Australian rock band AC/DC.