Nim Deathmantle, Ashnod's Altar, and Magus of the Bridge

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Magus of the Bridge on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Magus of the Bridge, adding
2. When Magus of the Bridge dies, it and Nim Deathmantle triggers
3. Resolve the Magus of the Bridge trigger, creating a 2/2 Zombie creature token
4. Activate Ashnod's Altar by sacrificing the Zombie, adding
5. Resolve the Nim Deathmantle trigger from step 2, causing you to pay to return Magus of the Bridge 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