Mirrorpool + Splendid Reclamation + Thaumatog + Amulet of Vigor

Mirrorpool

Splendid Reclamation

Thaumatog

Amulet of Vigor

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 Thaumatog 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 tapped.
7. When the lands enter, Amulet of Vigor triggers that many times, untapping the lands.
8. Repeat from step 2.

This clever recursion loop feeds on its own graveyard, turning mass land recovery into an engine of endless replication. You begin by casting Splendid Reclamation to dredge your discarded acreage back into play, but before it resolves, you feed your lands to Thaumatog until Mirrorpool stands entirely alone. That isolation allows Mirrorpool to sacrifice itself and copy the original Splendid Reclamation spell, doubling your magical output. Meanwhile, Amulet of Vigor stands watch to immediately untap every land that splashes back onto the battlefield, ensuring your freshly recovered mana sources are ready to fuel the cycle anew.