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

Prerequisites

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

Steps

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

Results

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