Rotlung Reanimator + Umbral Collar Zealot + Arcane Adaptation

Rotlung Reanimator

Umbral Collar Zealot

Arcane Adaptation

How it works

1. Activate Umbral Collar Zealot by sacrificing any other creature.
2. When the creature dies as a Cleric due to Arcane Adaptation, Rotlung Reanimator triggers, creating a 2/2 Zombie creature token.
3. Resolve the Umbral Collar Zealot ability.
4. Repeat.

This clever loop turns your battlefield into an unstoppable engine by leveraging Arcane Adaptation to make every creature you own share the Cleric type. With that blanket type-changing enchantment in play, sacrificing any creature to Umbral Collar Zealot immediately satisfies the condition for Rotlung Reanimator to trigger upon death. That trigger yields a fresh 2/2 Zombie creature token, which itself becomes a new sacrifice target for Umbral Collar Zealot while simultaneously feeding the cycle with continuous surveil, entry, and exit triggers.