Rot-Curse Rakshasa (Tarkir: Dragonstorm)

Creature Ñ Demon - Trample
Decayed (This creature can't block. When it attacks, sacrifice it at end of combat.)
Renew Ñ {X}{B}{B}, Exile this card from your graveyard: Put a decayed counter on each of X target creatures. Activate only as a sorcery.