Llanowar Scout + Rakdos Carnarium + Elven Raft-Steerer

Llanowar Scout

Rakdos Carnarium

Elven Raft-Steerer

How it works

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