Umbral Collar Zealot + Bioengineered Future

Umbral Collar Zealot

Bioengineered Future

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 without a -1/-1 counter on it due to Bioengineered Future
3. Resolve the Umbral Collar Zealot ability.
4. Repeat

This clever loop hinges on the elegant synergy between Umbral Collar Zealot and a persist creature, where sacrificing the creature triggers its return to the battlefield. Bioengineered Future plays a crucial foundational role here, as its static ability ensures creatures enter with an additional +1/+1 counter for each land that entered under your control this turn, effectively neutralizing the -1/-1 counter that would normally cripple a persist creature's loop. By repeatedly feeding your persist creature to Umbral Collar Zealot, you generate an infinite stream of sacrifice, death, and entry triggers while digging deep into your library with endless surveil.