Nim Deathmantle, Ashnod's Altar, and Brindle Shoat

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Brindle Shoat on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Brindle Shoat, adding
2. When Brindle Shoat dies, it and Nim Deathmantle triggers
3. Resolve the Brindle Shoat trigger, creating a 3/3 Boar creature token
4. Activate Ashnod's Altar by sacrificing the Boar, adding
5. Resolve the Nim Deathmantle trigger from step 2, causing you to pay to return Brindle Shoat from your graveyard to the battlefield, and attach Nim Deathmantle to it
6. Repeat

Results

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