Golgari Rot Farm + PuPu UFO + Elven Raft-Steerer

Golgari Rot Farm

PuPu UFO

Elven Raft-Steerer

How it works

1. Activate PuPu UFO by tapping it, putting Golgari Rot Farm from your hand onto the battlefield.
2. When Golgari Rot Farm enters the battlefield, it and Elven Raft-Steerer trigger.
3. Resolve the Golgari Rot Farm trigger, returning itself from the battlefield to your hand.
4. Resolve the Elven Raft-Steerer trigger, untapping PuPu UFO.
5. Repeat.