Nim Deathmantle, Ashnod's Altar, and Frost Fair Lure Fish

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Frost Fair Lure Fish on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Frost Fair Lure Fish, adding
2. When Frost Fair Lure Fish dies, Nim Deathmantle triggers, causing you to pay to return Frost Fair Lure Fish from your graveyard to the battlefield and attach Nim Deathmantle to it
3. When Frost Fair Lure Fish enters, it triggers, creating two 1/1 Fish creature tokens and two tapped Treasure tokens
4. Activate Ashnod's Altar by sacrificing a creature token, adding
5. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite death triggers
• Infinite sacrifice triggers
• Infinite tapped Treasure tokens
• Infinite creature tokens with haste