Boros Reckoner, and Indestructibility

Prerequisites

• Boros Reckoner on the battlefield
• Indestructibility on the battlefield

Steps

1. Give Boros Reckoner lifelink
2. Deal damage to Boros Reckoner
3. Boros Reckoner triggers, dealing that much damage to itself and causing you to gain that much life
4. Repeat step 4 any number of times

Results

• Infinite lifegain
• Infinite lifegain triggers