Malcolm, Keen-Eyed Navigator, Furnace Celebration, Opalescence, Xorn, and Xenograft

Prerequisites

• Malcolm, Keen-Eyed Navigator on the battlefield
• Furnace Celebration on the battlefield
• Opalescence on the battlefield
• Xorn on the battlefield
• Xenograft on the battlefield
• You control at least one Treasure token
• "Pirate" chosen with Xenograft
• available

Steps

1. Activate a Treasure by tapping and sacrificing it, adding
2. Furnace Celebration triggers, causing you to pay to deal two damage to an opponent
3. Malcolm triggers, creating two Treasure tokens
4. Activate the Treasures by tapping and sacrificing them, adding
5. Furnace Celebration triggers twice
6. Resolve the first trigger, choosing not to pay
7. Resolve the second trigger, causing you to pay to deal two damage to an opponent
8. Repeat from step 3

Results

• Infinite damage