Cass, Hand of Vengeance, Griffin Guide, and Goblin Bombardment

Prerequisites

• Cass, Hand of Vengeance on the battlefield
• Griffin Guide on the battlefield
• Goblin Bombardment on the battlefield

Steps

1. Activate Goblin Bombardment by sacrificing the creature with Griffin Guide attached
2. When the creature dies, Cass and Griffin Guide trigger
3. Resolve the Griffin Guide trigger, creating a 2/2 Griffin creature token
4. Resolve the Cass trigger, returning Griffin Guide from your graveyard to the battlefield attached to the Griffin token
5. Resolve the Goblin Bombardment ability, dealing 1 damage to any target
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite damage