Personality Clash

As an additional cost, sacrifice a creature.
Destroy target creature. Create an X/X blue
and black Horror creature token, where X is the sacrificed creature's power plus the destroyed creature's power. It has "At the beginning of
your upkeep, flip two coins. If both coins come
up heads, this creature gains menace until end
of turn. If both coins come up tails, target
opponent gains control of this creature."