Sidisi, Regent of the Mire, Karmic Guide, Goblin Bombardment, and Sparring Mummy

Prerequisites

• Sidisi, Regent of the Mire on the battlefield
• Karmic Guide in the graveyard
• Goblin Bombardment on the battlefield
• Sparring Mummy on the battlefield

Steps

1. Activate Sidisi by tapping it and sacrificing Sparring Mummy, returning Karmic Guide from your graveyard to the battlefield
2. When Karmic Guide enters the battlefield, it triggers, returning Sparring Mummy from your graveyard to the battlefield
3. When Sparring Mummy enters the battlefield, it triggers, untapping Sidisi
4. Activate Goblin Bombardment by sacrificing Karmic Guide
5. Repeat

Results

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