Zimone, Quandrix Prodigy + Retreat to Coralhelm + Azorius Chancery + Horizon Explorer

Zimone, Quandrix Prodigy

Retreat to Coralhelm

Azorius Chancery

Horizon Explorer

How it works

1. Activate Zimone's first ability by paying 1 and tapping it, putting Azorius Chancery from your hand onto the battlefield untapped due to Horizon Explorer.
2. When Azorius Chancery enters the battlefield, it and Retreat to Coralhelm trigger.
3. Holding priority, activate Azorius Chancery by tapping it, adding .
4. Resolve the Azorius Chancery 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 loop turns a simple bounce land into an infinite mana engine by exploiting how landfall and enter-the-battlefield triggers interact. With Horizon Explorer on the board ensuring your lands enter untapped, you use Zimone, Quandrix Prodigy to continually drop Azorius Chancery straight from your hand. Each time Azorius Chancery arrives, Retreat to Coralhelm triggers to untap Zimone, while the land's own bounce ability safely returns it right back to your hand so you can repeat the process and flood your pool with white and blue mana.