Mirrorpool + Splendid Reclamation + Coastal Hornclaw + The Wandering Minstrel

Mirrorpool

Splendid Reclamation

Coastal Hornclaw

The Wandering Minstrel

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 Coastal Hornclaw 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 The Wandering Minstrel.
7. Repeat from step 2.

This intricate loop hinges on cycling your entire land base into the graveyard and back, turning Splendid Reclamation into a self-sustaining engine. As you sacrifice your lands to fuel Coastal Hornclaw and thin your field down to a single essential piece, Mirrorpool waits in the wings to copy the impending spell rather than just casting it normally. Once Mirrorpool sacrifices itself to duplicate the effect, Splendid Reclamation resolves to bring everything right back, with The Wandering Minstrel ensuring those returning lands enter untapped and ready to generate more mana.