Mass Unburial

Create X 2/2 black Zombie creature tokens.
If X is 3 or more, all non-Zombie creatures
get -X/-X until end of turn.
"The cycle of this world was changed with the arrival
of this Bolas. Among the hordes of the undead was
the only place for the fallen. Undeath was the only
true afterlife."
--Itamhet, god of the afterlife