Retreat to Coralhelm, Scaled Herbalist, and Oboro, Palace in the Clouds

Prerequisites

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

Steps

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