Mirrorpool + Splendid Reclamation + Zuran Orb + Horizon Explorer

Mirrorpool

Splendid Reclamation

Zuran Orb

Horizon Explorer

How it works

1. Cast Splendid Reclamation by paying 3.
2. Holding priority, activate any number of lands you control except Mirrorpool by tapping them, adding at least 2C.
3. Activate Zuran Orb by sacrificing a land other than Mirrorpool.
4. Repeat step 3 until Mirrorpool is the only land you control.
5. Activate Mirrorpool's second ability by paying 2C, tapping and sacrificing it, copying Splendid Reclamation.
6. Resolve the Splendid Reclamation copy, returning all land cards from your graveyard to the battlefield untapped due to Horizon Explorer.
7. Repeat from step 2.

This fascinating loop lets you continuously recycle your entire land base to generate boundless resources, fueled entirely by sacrificing and resurrecting your lands in a tight, self-sustaining loop. You begin by casting Splendid Reclamation to dig every land out of your graveyard, but before it resolves, you funnel your resources through Zuran Orb to convert your lands into life while clearing the board so Mirrorpool can step in. When you finally sacrifice Mirrorpool to copy that original Splendid Reclamation, the newly copied spell brings your entire graveyard crashing back onto the battlefield. Crucially, Horizon Explorer ensures all those returning lands enter the battlefield untapped rather than tapped, allowing you to immediately tap them for mana, feed Zuran Orb again, and repeat the whole sequence with infinite landfall and mana generation.