Retreat to Coralhelm, Walking Atlas, and Oboro, Palace in the Clouds

Prerequisites

• Retreat to Coralhelm on the battlefield
• Walking Atlas on the battlefield
• Oboro, Palace in the Clouds in hand
• Walking Atlas does not have summoning sickness

Steps

1. Activate Walking Atlas by tapping it, putting Oboro from your hand onto the battlefield
2. Oboro enters the battlefield, triggering Retreat to Coralhelm, untapping Walking Atlas
3. Activate Oboro's first ability by tapping it, adding
4. Activate Oboro's second ability by paying , returning it from the battlefield to your hand
5. Repeat

Results

• Infinite landfall triggers