Nim Deathmantle, Cathodion, and Ashnod's Altar

Prerequisites

• Nim Deathmantle on the battlefield
• Cathodion on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Cathodion, adding
2. Cathodion and Nim Deathmantle trigger
3. Resolve the Cathodion trigger, adding
4. Resolve the Nim Deathmantle trigger, causing you to pay to return Cathodion from your graveyard to the battlefield, and then attach Nim Deathmantle to it
5. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers