Scaled Herbalist | Arid Archway | Elven Raft-Steerer

Cards

Arid Archway in hand.
Scaled Herbalist and
Elven Raft-Steerer on the battlefield (
Scaled Herbalist without summoning sickness).

Activate
Scaled Herbalist by tapping it, putting
Arid Archway from your hand onto the battlefield.
When
Arid Archway enters the battlefield, it and
Elven Raft-Steerer trigger.
Resolve the
Arid Archway trigger, returning itself from the battlefield to your hand.
Resolve the
Elven Raft-Steerer trigger, untapping
Scaled Herbalist.
Repeat.

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