Retreat to Coralhelm, Rakdos Carnarium, and Llanowar Scout

Prerequisites

• Retreat to Coralhelm on the battlefield
• Rakdos Carnarium in hand
• Llanowar Scout on the battlefield

Steps

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 Retreat to Coralhelm trigger
3. Resolve the Rakdos Carnarium trigger, returning itself from the battlefield to your hand
4. Resolve the Retreat to Coralhelm trigger, untapping Llanowar Scout
5. Repeat

Results

• Infinite landfall triggers