Eternal Scourge, Ashnod's Altar, Mimic Vat, and Sifter of Skulls

Prerequisites

• Eternal Scourge on the battlefield
• Ashnod's Altar on the battlefield
• Mimic Vat on the battlefield
• Sifter of Skulls on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Eternal Scourge, adding
2. When Eternal Scourge dies, Sifter of Skulls and Mimic Vat trigger
3. Resolve the Sifter of Skulls trigger, creating a 1/1 Eldrazi Scion creature token
4. Resolve the Mimic Vat trigger, exiling Eternal Scourge from your graveyard
5. Activate the Eldrazi Scion by sacrificing it, adding
6. Cast Eternal Scourge from exile by paying
7. Repeat

Results

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