Walking Atlas + Boros Garrison + Elven Raft-Steerer

Walking Atlas

Boros Garrison

Elven Raft-Steerer

How it works

1. Activate Walking Atlas by tapping it, putting Boros Garrison from your hand onto the battlefield.
2. When Boros Garrison enters the battlefield, it and Elven Raft-Steerer trigger.
3. Resolve the Boros Garrison trigger, returning itself from the battlefield to your hand.
4. Resolve the Elven Raft-Steerer trigger, untapping Walking Atlas.
5. Repeat.