Slimefoot and Squee, Nim Deathmantle, and Ashnod's Altar

Prerequisites

• Slimefoot and Squee on the battlefield
• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• available

Steps

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

Results

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