Casey Jones, Back Alley Brute, and Archangel of Thune

Prerequisites

• Casey Jones, Back Alley Brute on the battlefield
• Archangel of Thune on the battlefield

Steps

1. Gain life
2. Archangel of Thune triggers, putting a +1/+1 counter on each creature you control
3. Casey triggers, dealing damage to an opponent and causing you to gain that much life due to its lifelink
4. Repeat from step 2

Results

• Infinite +1/+1 counters on creatures you control
• Infinite damage
• Infinite lifegain
• Infinite lifegain triggers