Ghyrson Starn, Kelermorph + Boros Reckoner

Prerequisites

• You have a way to deal exactly 1 damage to Boros Reckoner.
• You have a way to give Boros Reckoner indestructible.

Steps

1. 1Give Boros Reckoner indestructible, if needed, and then deal exactly 1 damage to Boros Reckoner.
2. 2Boros Reckoner and Ghyrson Starn trigger.
3. 3Resolve the Ghyrson Starn trigger, dealing 2 damage to Boros Reckoner.
4. 4Boros Reckoner triggers, dealing 2 damage to any target.
5. 5Resolve the Boros Reckoner trigger from step 2, dealing 1 damage to itself.
6. 6Repeat from step 2.

Effects

• Infinite damage