Sunbond, Verdant Sun's Avatar, and Herd Baloth

Prerequisites

• Sunbond on the battlefield
• Verdant Sun's Avatar on the battlefield
• Herd Baloth on the battlefield

Steps

1. Gain life
2. Sunbond triggers, putting a +1/+1 counter on Herd Baloth
3. Herd Baloth triggers, creating a creature token
4. When the creature token enters the battlefield, Verdant Sun's Avatar triggers, causing you to gain 4 life
5. Repeat from step 2

Results

• Infinite ETB
• Infinite lifegain triggers
• Infinite lifegain
• Infinite creature tokens
• Infinite +1/+1 counters on a creature