Umbral Collar Zealot, and Thunderous Velocipede

Prerequisites

• Umbral Collar Zealot on the battlefield
• Thunderous Velocipede 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 Thunderous Velocipede Resolve the Umbral Collar Zealot ability
3. Repeat

Results

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