Retreat to Coralhelm, Simic Growth Chamber, and Walking Atlas

Prerequisites

• Retreat to Coralhelm on the battlefield
• Simic Growth Chamber in hand
• Walking Atlas on the battlefield

Steps

1. Activate Walking Atlas by tapping it, putting Simic Growth Chamber from your hand onto the battlefield
2. When Simic Growth Chamber enters the battlefield, it and Retreat to Coralhelm trigger
3. Resolve the Simic Growth Chamber trigger, returning itself from the battlefield to your hand
4. Resolve the Retreat to Coralhelm trigger, untapping Walking Atlas
5. Repeat

Results

• Infinite landfall triggers