Gnostro, Voice of the Crags, Heliod, Sun-Crowned, Crystalline Crawler, and Pemmin's Aura

Prerequisites

• Gnostro, Voice of the Crags on the battlefield
• Heliod, Sun-Crowned on the battlefield
• Crystalline Crawler on the battlefield
• Pemmin's Aura on the battlefield
• Gnostro does not have summoning sickness
• Pemmin's Aura attached to Gnostro
• You have a storm count of at least one

Steps

1. Activate Gnostro by tapping it, causing you to gain at least 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 Pemmin's Aura's first ability by paying , untapping Gnostro
5. Repeat

Results

• Infinite lifegain
• Infinite lifegain triggers