Retreat to Coralhelm, Llanowar Scout, and Gruul Turf

Prerequisites

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

Steps

1. Activate Llanowar Scout 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 Llanowar Scout
5. Repeat

Results

• Infinite landfall triggers