Retreat to Coralhelm, Walking Atlas, and Gruul Turf

Prerequisites

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

Steps

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