Retreat to Coralhelm, Boros Garrison, and Scaled Herbalist

Prerequisites

• Retreat to Coralhelm on the battlefield
• Boros Garrison in hand
• Scaled Herbalist on the battlefield

Steps

1. Activate Scaled Herbalist by tapping it, putting Boros Garrison from your hand onto the battlefield
2. When Boros Garrison enters the battlefield, it and Retreat to Coralhelm trigger
3. Resolve the Boros Garrison trigger, returning itself from the battlefield to your hand
4. Resolve the Retreat to Coralhelm trigger, untapping Scaled Herbalist
5. Repeat

Results

• Infinite landfall triggers