Goblin Bombardment, and Good-Fortune Unicorn

Prerequisites

• Goblin Bombardment on the battlefield
• Good-Fortune Unicorn on the battlefield

Steps

1. Activate Goblin Bombardment by sacrificing the persist creature
2. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. When the persist creature enters, Good-Fortune Unicorn triggers, putting a +1/+1 counter on the persist creature
4. Resolve the Goblin Bombardment ability
5. Repeat

Results

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