Scurry Oak, Light of Promise, and Verdant Sun's Avatar

Prerequisites

• Scurry Oak on the battlefield
• Light of Promise on the battlefield
• Verdant Sun's Avatar on the battlefield
• Light of Promise attached to Scurry Oak
• You have a way to gain life

Steps

1. Gain any amount of life
2. Light of Promise triggers, putting a number of +1/+1 counters on Scurry Oak equal to the amount of life gained
3. Scurry Oak triggers, creating a 1/1 Squirrel creature token
4. The Squirrel enters the battlefield, triggering Verdant Sun's Avatar, causing you to gain 1 life
5. Repeat from step 2

Results

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