Nim Deathmantle, Ashnod's Altar, and Lord Skitter's Butcher

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Lord Skitter's Butcher on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Lord Skitter's Butcher, adding
2. When Lord Skitter's Butcher dies, Nim Deathmantle triggers, causing you to pay to return Lord Skitter's Butcher from your graveyard to the battlefield, and attach Nim Deathmantle to it
3. When Lord Skitter's Butcher 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