Mikaeus, the Unhallowed, Bloodied Ghost, and Goblin Bombardment

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Bloodied Ghost on the battlefield
• Goblin Bombardment on the battlefield

Steps

1. Activate Goblin Bombardment by sacrifiicing Bloodied Ghost
2. When Bloodied Ghost dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it
3. When it enters, Bloodied Ghost will put a -1/-1 counter on itself, removing the +1/+1 counter
4. Resolve the Goblin Bombardment ability
5. Repeat

Results

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