Retreat to Coralhelm, Llanowar Scout, and Oboro, Palace in the Clouds

Prerequisites

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

Steps

1. Activate Llanowar Scout by tapping it, putting Oboro from your hand onto the battlefield
2. Oboro enters the battlefield, triggering Retreat to Coralhelm, untapping Llanowar Scout
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