Gravemaw, Sightless Seeker

Deathtouch
{1}{b}{g}, Sacrifice another creature: Return
Gravemaw, Sightless Seeker and a creature card
with converted mana cost equal to 1 plus the sacrificed creature's converted mana cost, from
your graveyard to the battlefield tapped. Then
put a menace counter on both of them. Activate
this ability only any time you could cast a sorcery.
Go fetch!