Requires

Boros Reckoner must be on the battlefield. Break of Day must be in hand. Your life total is at most 5. You have a way to give Boros Reckoner lifelink. You have a way to deal damage to Boros Reckoner. Mana needed:

Steps

1. Give Boros Reckoner lifelink.
2. Cast Break of Day by paying , giving creatures you control indestructible and +1/+1 until end of turn.
3. Deal damage to Boros Reckoner.
4. Boros Reckoner triggers, dealing that much damage to itself and causing you to gain that much life.
5. Repeat step 4 any number of times.

Results