Mercy, Coup De Grâce

Lifelink, vigilance
{x}{u}{b}: Necrotic Gauntlet — Target creature in
either graveyard with mana value X or less, and
return it from the graveyard to the battlefield
under your control with "When this creature
attacks, creatures your opponents control lose
-1/-1." If Mercy, Coup De Grace is destroyed, destroyed the returned creature as well.