Wrath of Ivy

Put a -1/-1 on each creature on the battlefield.
Remove keyword abilities, static abilities, trigger abilities, and +1/+1 counters from all creatures
on the battlefield.
Until end of turn, whenever a creature dies, each
other creature gets a -1/-1 counter.
—
"You want bloodshed, I'll give you bloodshed. I'll give
you war." -Ivy