Ghyrson Starn, Kelermorph, Nomads en-Kor, Eldrazi Monument, Boros Reckoner, and Sakashima the Impostor

Prerequisites

• Ghyrson Starn, Kelermorph on the battlefield
• Nomads en-Kor on the battlefield
• Eldrazi Monument on the battlefield
• Boros Reckoner on the battlefield
• Sakashima the Impostor on the battlefield
• You have a way to deal damage to Nomads en-Kor
• You have a way to give Boros Reckoner lifelink
• You have a way to deal damage to Boros Reckoner

Steps

1. Target Nomads en-Kor with an effect dealing any amount of damage
2. Holding priority, if the amount of damage that would be dealt is greater than 1, activate Nomads en-Kor by paying , causing the next 1 damage that would be dealt to it this turn to be dealt to Boros Reckoner instead
3. Repeat step 2 until only 1 damage will be dealt to Nomads en-Kor
4. Resolve the effect, dealing 1 damage to Nomads en-Kor and the remaining damage to Boros Reckoner if applicable
5. Ghyrson Starn and Sakashima the Impostor trigger, as well as Boros Reckoner if it was dealt damage
6. Resolve the Boros Reckoner trigger, dealing that much damage to target opponent
7. Resolve the Ghyrson Starn trigger, targeting Nomads en-Kor
8. Repeat steps 2 through 4 one additional time
9. Sakashima the Impostor and Boros Reckoner trigger
10. Resolve the Boros Reckoner trigger, dealing that much damage to target opponent
11. Resolve the Sakashima the Impostor trigger, targeting Nomads en-Kor
12. Repeat steps 2 through 4 one additional time
13. Ghyrson Starn and Boros Reckoner trigger
14. Repeat from step 6
15. Give Boros Reckoner lifelink
16. Deal damage to Boros Reckoner
17. Boros Reckoner triggers, dealing that much damage to itself and causing you to gain that much life
18. Repeat step 4 any number of times

Results

• Infinite damage
• Infinite lifegain
• Infinite lifegain triggers