Zimone, Quandrix Prodigy + Retreat to Coralhelm + Guildless Commons + Horizon Explorer

Zimone, Quandrix Prodigy

Retreat to Coralhelm

Guildless Commons

Horizon Explorer

How it works

1. Activate Zimone's first ability by paying 1 and tapping it, putting Guildless Commons from your hand onto the battlefield untapped due to Horizon Explorer.
2. When Guildless Commons enters the battlefield, it and Retreat to Coralhelm trigger.
3. Holding priority, activate Guildless Commons by tapping it, adding CC.
4. Resolve the Guildless Commons 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 endless engine by leveraging Horizon Explorer so that Guildless Commons enters the battlefield untapped instead of its usual slow pace. As Guildless Commons enters, it triggers its own return-to-hand effect while also fueling Retreat to Coralhelm's landfall ability, which untaps Zimone, Quandrix Prodigy so she can tap again to drop Guildless Commons right back onto the battlefield. Before that return trigger resolves, you simply tap Guildless Commons for mana, letting you repeat the entire process to generate infinite colorless mana and infinite landfall triggers.