Retreat to Coralhelm + Dimir Aqueduct + PuPu UFO

Prerequisites

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Steps

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