Grumgully, the Generous, Putrid Goblin, and Goblin Bombardment

Prerequisites

• Grumgully, the Generous on the battlefield
• Putrid Goblin on the battlefield
• Goblin Bombardment on the battlefield
• Putrid Goblin does not have any -1/-1 counters

Steps

1. Activate Goblin Bombardment by sacrificing Putrid Goblin
2. Putrid Goblin dies
3. Putrid Goblin's persist ability triggers, returning it to the battlefield with no counter, due to Grumgully
4. Resolve the Goblin Bombardment's ability, dealing 1 damage to any target
5. Repeat

Results

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