Nim Deathmantle, Ashnod's Altar, and Abhorrent Overlord

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Abhorrent Overlord on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Abhorrent Overlord, adding
2. When Abhorrent Overlord dies, Nim Deathmantle triggers, causing you to pay to return Abhorrent Overlord from your graveyard to the battlefield and attach Nim Deathmantle to it
3. When Abhorrent Overlord enters, it triggers, creating at least two creature tokens
4. Activate Ashnod's Altar by sacrificing a creature token, adding
5. Repeat

Results

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