Oboro Breezecaller + Retreat to Coralhelm + Sakura-Tribe Scout

Oboro Breezecaller

Retreat to Coralhelm

Sakura-Tribe Scout

How it works

1. Activate Sakura-Tribe Scout by tapping it, putting a land from your hand onto the battlefield.
2. When the land enters the battlefield, Retreat to Coralhelm triggers, untapping Sakura-Tribe Scout.
3. Activate the land and another land by tapping them, adding at least 2.
4. Activate Oboro Breezecaller by paying 2 and returning a land from the battlefield to your hand, untapping another land.
5. Repeat.