Retreat to Coralhelm + Walking Atlas + Oboro, Palace in the Clouds

Retreat to Coralhelm

Walking Atlas

Oboro, Palace in the Clouds

How it works

1. Activate Walking Atlas by tapping it, putting Oboro from your hand onto the battlefield.
2. When Oboro enters the battlefield, Retreat to Coralhelm triggers, untapping Walking Atlas.
3. Activate Oboro's first ability by tapping it, adding .
4. Activate Oboro's second ability by paying 1, returning it from the battlefield to your hand.
5. Repeat.