Retreat to Coralhelm + Azorius Chancery + PuPu UFO

Prerequisites

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Steps

1. 1Activate PuPu UFO by tapping it, putting Azorius Chancery from your hand onto the battlefield.
2. 2When Azorius Chancery enters the battlefield, it and Retreat to Coralhelm trigger.
3. 3Resolve the Azorius Chancery trigger, returning itself from the battlefield to your hand.
4. 4Resolve the Retreat to Coralhelm trigger, untapping PuPu UFO.
5. 5Repeat.

Effects

• Infinite landfall triggers