Pestilent One

When Pestilent One dies, create a black Aura enchantment token named Plague attached to target creature. It has enchant creature and
"{3}: Put a -1/-1 counter on each creature for each Plague attached to it, then create a token that's a copy of this permanent attached to target creature."
A world without pestilence and rot is a plague unto itself; every life must have an end.