T: Add B.
Whenever a creature you control dies, put a corpse counter on Crowded Crypt.
4BB, 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.)

NOTE: Stock image, not actual card.