Llanowar Scout + Guildless Commons + Elven Raft-Steerer

Llanowar Scout

Guildless Commons

Elven Raft-Steerer

How it works

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