Crowded Crypt

{t}: Add {b}.

Whenever a creature you control dies, put a corpse counter on Crowded Crypt.

{4}{b}{b}, {t}, Sacrifice Crowded Crypt: Create a
2/2 black Zombie zombie creature token with decayed for each corpse counted on Crowded Crypt. (A creature with decayed can't block. When it attacks, sacrifice it at the end of combat.)