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 creature token with decayed for each corpse counter on Crowded Crypt. (A creature with decayed can't block. When it attacks, sacrifice it at end of combat.)