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.
"The crypt was meant to hold the dead, not to keep
them locked up."