Umbral Collar Zealot, and Grumgully, the Generous

Prerequisites

• Umbral Collar Zealot on the battlefield
• Grumgully, the Generous on the battlefield

Steps

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 Grumgully Resolve the Umbral Collar Zealot ability
3. Repeat

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite death triggers
• Infinite creature sacrifice triggers
• Infinite surveil