Rakkadi, Lord of Violence

Rakkadi, Lord of Violence costs {1} less to cast for
each creature you sacrifice when you cast it.
Flying, trample, menace, protection from white
Whenever a creature dies, Rakkadi, Lord of
Violence deals X damage to target opponent and
you gain X life, where X is the number of
creatures sacrificed when Rakkadi, Lord of
Violence was cast plus 1.