Retreat to Coralhelm, Llanowar Scout, and Azorius Chancery

Prerequisites

• Retreat to Coralhelm on the battlefield
• Llanowar Scout on the battlefield
• Azorius Chancery in hand
• Llanowar Scout does not have summoning sickness

Steps

1. Activate Llanowar Scout by tapping it, putting Azorius Chancery from your hand onto the battlefield
2. Azorius Chancery enters the battlefield, triggering itself and Retreat to Coralhelm
3. Resolve the Azorius Chancery 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