Timothar, Baron of Bats, Eternal Scourge, Ashnod's Altar, and Xenograft

Prerequisites

• Timothar, Baron of Bats on the battlefield
• Eternal Scourge on the battlefield
• Ashnod's Altar on the battlefield
• Xenograft on the battlefield
• "Vampire" chosen with Xenograft

Steps

1. Activate Ashnod's Altar by sacrificing Eternal Scourge, adding
2. When Eternal Scourge dies as a Vampire due to Xenograft, Timothar triggers, causing you to pay and exile Eternal Scourge to create a 1/1 Bat creature token
3. Activate Ashnod's Altar by sacrificing the Bat, adding
4. Cast Eternal Scourge from exile by paying
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count