Basking Broodscale, Leonin Elder, Encroaching Mycosynth, and Heroic Feast

Prerequisites

• Basking Broodscale on the battlefield
• Leonin Elder on the battlefield
• Encroaching Mycosynth on the battlefield
• Heroic Feast on the battlefield

Steps

1. Gain life in any way
2. Heroic Feast triggers, putting a +1/+1 counter on Basking Broodscale
3. Basking Broodscale triggers, creating a creature token that enters the battlefield as an artifact due to Encroaching Mycosynth
4. Leonin Elder 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 LTB
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite sacrifice triggers