Sidisi, Regent of the Mire, Karmic Guide, Bloodthrone Vampire, and Sparring Mummy

Prerequisites

• Sidisi, Regent of the Mire on the battlefield
• Karmic Guide in the graveyard
• Bloodthrone Vampire 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 Bloodthrone Vampire by sacrificing Karmic Guide
5. Repeat

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinitely large creature until end of turn