Light of Promise, Encroaching Mycosynth, Teething Wurmlet, and Herd Baloth

Prerequisites

• Light of Promise on the battlefield
• Encroaching Mycosynth on the battlefield
• Teething Wurmlet on the battlefield
• Herd Baloth on the battlefield

Steps

1. Gain life in any way
2. Herd Baloth triggers, putting a +1/+1 counter on itself
3. Herd Baloth triggers, creating a creature token that enters the battlefield as an artifact due to Encroaching Mycosynth
4. Teething Wurmlet triggers, causing you to gain life
5. Repeat from step 2

Results

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