Shalai and Hallar, and The Destined White Mage

Prerequisites

• Shalai and Hallar on the battlefield
• The Destined White Mage on the battlefield

Steps

1. Give Shalai and Hallar lifelink by any method
2. Gain life by any method
3. The Destined White Mage triggers, putting a +1/+1 counter on a creature you control
4. Shalai and Hallar triggers, dealing 1 damage to an opponent and causing you to gain at least 1 life
5. Repeat from step 2

Results

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