Retreat to Coralhelm, Llanowar Scout, and Orzhov Basilica

Prerequisites

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

Steps

1. Activate Llanowar Scout 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 Llanowar Scout
5. Repeat

Results

• Infinite landfall triggers