Dark Necromancer

When Dark Necromancer enters the battlefield,
you lose X life and return a black creature with
converted mana cost X or less from your
graveyard onto the battlefield, where X is equal
to your devotion to black.
The curse of eternal life is not easily broken. By the
Old Law, even the most heinous curse must contain
the seed of its undoing. Azoth could break the
burdensome cycle of undeath through ten thousand
selfless acts.