Heliod, Sun-Crowned, Herd Baloth, and Verdant Sun's Avatar

Prerequisites

• Heliod, Sun-Crowned on the battlefield
• Herd Baloth on the battlefield
• Verdant Sun's Avatar on the battlefield
• You have a way to gain life

Steps

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

Results

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