Retreat to Coralhelm, Arid Archway, and Sakura-Tribe Scout

Prerequisites

• Retreat to Coralhelm on the battlefield
• Arid Archway in hand
• Sakura-Tribe Scout on the battlefield

Steps

1. Activate Sakura-Tribe Scout 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 Sakura-Tribe Scout
5. Repeat

Results

• Infinite landfall triggers