Bonny Pall, Clearcutter, Nim Deathmantle, and Ashnod's Altar

Prerequisites

• Bonny Pall, Clearcutter on the battlefield
• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Bonny Pall, adding
2. When Bonny Pall dies, Nim Deathmantle triggers, causing you to pay to return Bonny from your graveyard to the battlefield, and attach Nim Deathmantle to it
3. When Bonny Pall enters the battlefield, it triggers, creating a */* Beau legendary creature token
4. Activate Ashnod's Altar by sacrificing Beau, adding
5. Repeat

Results

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