Nim Deathmantle, Ashnod's Altar, and Edgewall Pack

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Edgewall Pack on the battlefield
• available

Steps

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

Results

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