Zimone, Quandrix Prodigy + Retreat to Coralhelm + Arid Archway + Horizon Explorer

Zimone, Quandrix Prodigy

Retreat to Coralhelm

Arid Archway

Horizon Explorer

How it works

1. Activate Zimone's first ability by paying 1 and tapping it, putting Arid Archway from your hand onto the battlefield untapped due to Horizon Explorer.
2. When Arid Archway enters the battlefield, it and Retreat to Coralhelm trigger.
3. Holding priority, activate Arid Archway by tapping it, adding CC.
4. Resolve the Arid Archway trigger from step 2, returning itself from the battlefield to your hand.
5. Resolve the Retreat to Coralhelm trigger, untapping Zimone.
6. Repeat.

This clever engine harnesses the quiet power of Horizon Explorer to make all your incoming lands enter untapped, allowing Arid Archway to immediately drop and trigger a cascade of events. When Arid Archway hits the battlefield, its bounce ability and Retreat to Coralhelm's landfall trigger go on the stack together, letting you tap the Archway for colorless mana before it returns to your hand. Meanwhile, Retreat to Coralhelm untaps Zimone, Quandrix Prodigy, which pays for the loop and lets you redeploy the Arid Archway right back onto the battlefield.