Retreat to Coralhelm + Guildless Commons + Skyshroud Ranger

Retreat to Coralhelm

Guildless Commons

Skyshroud Ranger

How it works

1. Activate Skyshroud Ranger by tapping it, putting Guildless Commons from your hand onto the battlefield.
2. When Guildless Commons enters the battlefield, it and Retreat to Coralhelm trigger.
3. Resolve the Guildless Commons trigger, returning itself from the battlefield to your hand.
4. Resolve the Retreat to Coralhelm trigger, untapping Skyshroud Ranger.
5. Repeat.