Walking Atlas | Boros Garrison | Elven Raft-Steerer

Cards

Boros Garrison in hand.
Walking Atlas and
Elven Raft-Steerer on the battlefield (
Walking Atlas without summoning sickness).

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

This combo has been estimated to be Exhibition (Bracket 1+).