Cleric Class, Crystalline Crawler, Pemmin's Aura, and Soulmender

Prerequisites

• Cleric Class on the battlefield
• Crystalline Crawler on the battlefield
• Pemmin's Aura on the battlefield
• Soulmender on the battlefield

Steps

1. Activate Soulmender by tapping it, causing you to gain 2 life
2. Cleric Class triggers, putting a +1/+1 counter on Crystalline Crawler
3. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding
4. Activate Pemmin's Aura's first ability by paying , untapping Soulmender
5. Repeat

Results

• Infinite lifegain
• Infinite lifegain triggers