Infectious Saprotroph

Wither.
Remove three spore counters from Infectious Saprotroph: Put a -1/-1 counter on target
creature.
Whenever a creature with a -1/-1 counter on it
dies, exile that creature instead. If a creature was
exiled this way, create a 2/2 black Zombie
creature token with Wither. Then put a spore
counter on Infectious Saprotroph.