Volrath, the Maniacal

Whenever a spell or ability you control requires
you to sacrifice a creature, you may instead
choose target creature an opponent controls,
then that player sacrifices that creature.
{p/b}{p/b}{p/b}, Sacrifice another creature: Put three
+1/+1 counters on Volrath, the Maniacal.
"You are nothing more than the means to my end."