Sling-Gang Lieutenant, Ashnod's Altar, and Nim Deathmantle

Prerequisites

• Sling-Gang Lieutenant on the battlefield
• Ashnod's Altar on the battlefield
• Nim Deathmantle on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Sling-Gang Lieutenant, adding
2. Sling-Gang Lieutenant dies, triggering Nim Deathmantle, causing you to pay to return Sling-Gang Lieutenant to the battlefield, and then attach Nim Deathmantle to it
3. Sling-Gang Lieutenant enters the battlefield, creating two 1/1 Goblin creature tokens
4. Activate Ashnod's Altar by sacrificing a Goblin token, adding
5. Repeat

Results

• Each opponent loses the game
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite lifeloss
• Infinite LTB
• Infinite sacrifice triggers