Ancient Adamantoise, Nim Deathmantle, Umbral Collar Zealot, and Archelos, Lagoon Mystic

Prerequisites

• Ancient Adamantoise on the battlefield
• Nim Deathmantle on the battlefield
• Umbral Collar Zealot on the battlefield
• Archelos, Lagoon Mystic on the battlefield
• available

Steps

1. Activate Umbral Collar Zealot by sacrificing Ancient Adamantoise
2. When Ancient Adamantoise dies, it and Nim Deathmantle trigger
3. Resolve the Nim Deathmantle trigger, causing you to pay to return Ancient Adamantoise from your graveyard to the battlefield and attach Nim Deathmantle to it
4. Resolve the Ancient Adamantoise trigger, creating ten Treasure tokens that enter untapped due to Archelos
5. Resolve the Umbral Collar Zealot ability
6. Activate four Treasures by tapping and sacrificing them, adding
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite Treasure tokens
• Infinite surveil 1