Midnight Coven Sorceress

Midnight Coven Sorceress can't be blocked except
by black creatures.
{b}: Black creature permanents gain Heresy (When
this creature enters the battlefield for the first time each
turn, it enters under target opponents control. That
player loses life equal to this creature's power.)
"Darkness is not always bad, light is not always good.
I can teach you blessings of the night, so that you may
learn to distrust the light."