Ezoc, Decay Accelerator

Partner with Devesh, Grim Scavenger (When this
creature enters the battlefield, target player may
put Devesh into their hand from their library,
then shuffle.)
At the beginning of each upkeep, put a -1/-1
counter on each creature with a -1/-1 counter
on it.
{2}{b}{g},{t}: Put a -1/-1 counter on target
creature.