Retreat to Coralhelm, Walking Atlas, and Orzhov Basilica

Prerequisites

• Retreat to Coralhelm on the battlefield
• Walking Atlas on the battlefield
• Orzhov Basilica in hand
• Walking Atlas does not have summoning sickness

Steps

1. Activate Walking Atlas by tapping it, putting Orzhov Basilica from your hand onto the battlefield
2. Orzhov Basilica enters the battlefield, triggering itself and Retreat to Coralhelm
3. Resolve the Orzhov Basilica 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