Blightbeetle, Ashnod's Altar, and Zedruu the Greathearted

Prerequisites

• Blightbeetle on the battlefield
• Ashnod's Altar on the battlefield
• Zedruu the Greathearted on the battlefield
• available

Steps

1. Donate Blightbeetle to an opponent Activate Ashnod's Altar 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. Repeat from step 2

Results

• Infinite creature LTB
• Infinite creature ETB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite colorless mana