Blightbeetle, Bartolomé del Presidio, and Zedruu the Greathearted

Prerequisites

• Blightbeetle on the battlefield
• Bartolomé del Presidio on the battlefield
• Zedruu the Greathearted on the battlefield
• available

Steps

1. Donate Blightbeetle to an opponent Activate Bartolomé del Presidio 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 Bartolomé del Presidio ability
4. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite +1/+1 counters on Bartolomé del Presidio