Heliod, Sun-Crowned, Crystalline Crawler, Freed from the Real, and Soulmender

Prerequisites

• Heliod, Sun-Crowned on the battlefield
• Crystalline Crawler on the battlefield
• Freed from the Real on the battlefield
• Soulmender on the battlefield
• Soulmender does not have summoning sickness
• Freed from the Real attached to Soulmender

Steps

1. Activate Soulmender by tapping it, causing you to gain 1 life
2. Heliod 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 Freed from the Real's second ability by paying , untapping Soulmender
5. Repeat

Results

• Infinite lifegain
• Infinite lifegain triggers