Boros Reckoner + Indestructibility

Boros Reckoner

All permanents on the battlefield. Indestructibility attached to Boros Reckoner. You have a way to give Boros Reckoner lifelink. You have a way to deal damage to Boros Reckoner.
  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
Infinite lifegain. Infinite lifegain triggers.