Casey Jones, Back Alley Brute, and The Destined White Mage

Prerequisites

• Casey Jones, Back Alley Brute on the battlefield
• The Destined White Mage on the battlefield

Steps

1. Gain life
2. The Destined White Mage triggers, putting a +1/+1 counter on Casey
3. Casey triggers, dealing 1 damage to an opponent and causing you to gain 1 life due to its lifelink
4. Repeat from step 2

Results

• Infinite +1/+1 counters on a creature
• Infinite damage
• Infinite lifegain
• Infinite lifegain triggers