Umbral Collar Zealot + Rocksteady, Mutant Marauder

Umbral Collar Zealot

Rocksteady, Mutant Marauder

How it works

1. Activate Umbral Collar Zealot by sacrificing the persist creature.
2. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When the persist creature enters, Rocksteady triggers, putting a +1/+1 counter on that creature.
4. Resolve the Umbral Collar Zealot ability.
5. Repeat