Blightbeetle, Umbral Collar Zealot, and Zedruu the Greathearted

Prerequisites

• Blightbeetle on the battlefield
• Umbral Collar Zealot on the battlefield
• Zedruu the Greathearted on the battlefield
• available

Steps

1. Donate Blightbeetle to an opponent Activate Umbral Collar Zealot by sacrificing the undying creature
2. When the undying creature dies, its undying ability triggers, returning itself from your graveyard to the battlefield without a +1/+1 counter on it due to Blightbeetle
3. Resolve the Umbral Collar Zealot ability
4. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite surveil 1