Volcano Hellion, Metropolis Reformer, and Angel's Grace

Prerequisites

• Volcano Hellion in hand
• Metropolis Reformer on the battlefield
• Angel's Grace in hand
• available

Steps

1. Cast Angel's Grace by paying , causing all damage that would reduce your life total to less than one this turn to reduce your life total to one instead
2. Cast Volcano Hellion by paying
3. When Volcano Hellion enters the battlefield, it triggers, dealing an arbitrarily large amount of damage to you and Metropolis Reformer, with your life total instead becoming one due to Angel's Grace
4. Metropolis Reformer triggers, causing you to gain life equal to the damage dealt to it

Results

• Infinite lifegain