Retreat to Coralhelm + Selesnya Sanctuary + PuPu UFO

Prerequisites

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Steps

1. 1Activate PuPu UFO by tapping it, putting Selesnya Sanctuary from your hand onto the battlefield.
2. 2When Selesnya Sanctuary enters the battlefield, it and Retreat to Coralhelm trigger.
3. 3Resolve the Selesnya Sanctuary 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