Nim Deathmantle, Ashnod's Altar, and Threefold Thunderhulk

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Threefold Thunderhulk on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Threefold Thunderhulk, adding
2. When Threefold Thunderhulk dies, Nim Deathmantle triggers, causing you to pay to return Threefold Thunderhulk from your graveyard to the battlefield and attach Nim Deathmantle to it
3. When Threefold Thunderhulk enters, it triggers, creating at least five 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