Enkira, Hostile Scavenger, Nim Deathmantle, and Ashnod's Altar

Prerequisites

• Enkira, Hostile Scavenger on the battlefield
• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield

Steps

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

Results

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