Byron Bonesculptor

Deathtouch
Whenever a creature an opponent controls dies,
you may pay {b}{g}. If you do, return that creature
to the battlefield under your control with a
"Despair" counter on it. On a turn where a
creature with a "Despair" counter on it attacks,
blocks or activates an activation ability, you must
sacrifice it at the end of the turn.
"I can only promise you so much."