Nim Deathmantle, Ashnod's Altar, and Mesmerizing Benthid

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Mesmerizing Benthid on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Mesmerizing Benthid, adding
2. Mesmerizing Benthid dies, triggering Nim Deathmantle, causing you to pay to return Mesmerizing Benthid from your graveyard to the battlefield, and attach Nim Deathmantle to it
3. Mesmerizing Benthid enters the battlefield, creating two 0/2 Illusion creature tokens
4. Activate Ashnod's Altar by sacrificing an Illusion, adding
5. Repeat

Results

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