Ashnod's Altar, Nim Deathmantle, and Beetleback Chief

Prerequisites

• Ashnod's Altar on the battlefield
• Nim Deathmantle on the battlefield
• Beetleback Chief on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Beetleback Chief, adding
2. Nim Deathmantle triggers, causing you to pay to return Beetleback Chief from your graveyard to the battlefield, and then attach Nim Deathmantle to it
3. Beetleback Chief triggers, creating two 1/1 Goblin tokens
4. Activate Ashnod's Altar by sacrificing two Goblin tokens, adding
5. Repeat

Results

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