Izzet Boilerworks + PuPu UFO + Elven Raft-Steerer

Izzet Boilerworks

PuPu UFO

Elven Raft-Steerer

How it works

1. Activate PuPu UFO 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 PuPu UFO.
5. Repeat.