Llanowar Scout + Izzet Boilerworks + Elven Raft-Steerer

Llanowar Scout

Izzet Boilerworks

Elven Raft-Steerer

How it works

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