Nim Deathmantle, Ashnod's Altar, and Debtors' Transport

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Debtors' Transport on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Debtors' Transport, adding
2. When Debtors' Transport dies, its afterlife ability and Nim Deathmantle trigger
3. Resolve the Debtors' Transport trigger, creating two 1/1 Spirit creature tokens
4. Activate Ashnod's Altar by sacrificing a Spirit, adding
5. Resolve the Nim Deathmantle trigger from step 2, causing you to pay to return Debtors' Transport from your graveyard to the battlefield, and attach Nim Deathmantle to it
6. Repeat

Results

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