Retreat to Coralhelm, Arid Archway, and Skyshroud Ranger

Prerequisites

• Retreat to Coralhelm on the battlefield
• Arid Archway in hand
• Skyshroud Ranger on the battlefield

Steps

1. Activate Skyshroud Ranger by tapping it, putting Arid Archway from your hand onto the battlefield
2. When Arid Archway enters the battlefield, it and Retreat to Coralhelm trigger
3. Resolve the Arid Archway trigger, returning itself from the battlefield to your hand
4. Resolve the Retreat to Coralhelm trigger, untapping Skyshroud Ranger
5. Repeat

Results

• Infinite landfall triggers