Ancient Adamantoise, and Arcbond

Prerequisites

• Ancient Adamantoise on the battlefield
• Arcbond in hand
• available

Steps

1. Give Ancient Adamantoise indestructible by any method
2. Cast Arcbond by paying , targeting Ancient Adamantoise Deal damage to yourself or a permanent you control, with that damage being redirected to Ancient Adamantoise Arcbond triggers, dealing damage equal to the damage dealt to Ancient Adamantoise to each other creature and each player, with all damage that would be dealt to you and creatures you control being dealt to Ancient Adamantoise instead
3. Repeat from step 4

Results

• Infinite damage