Nim Deathmantle, Ashnod's Altar, and Armada Wurm

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Armada Wurm on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Armada Wurm, adding
2. Armada Wurm dies, triggering Nim Deathmantle, causing you to pay to return Armada Wurm from your graveyard to the battlefield, and attach Nim Deathmantle to it
3. Armada Wurm enters the battlefield, creating a 5/5 Wurm creature token
4. Activate Ashnod's Altar by sacrificing the Wurm, adding
5. Repeat

Results

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