Mirrorpool + Splendid Reclamation + Thaumatog + The Wandering Minstrel

Mirrorpool

Splendid Reclamation

Thaumatog

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 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 untapped due to The Wandering Minstrel.
7. Repeat from step 2.

This crafty loop centers on recycling your land base to endlessly replicate your own spells, fueled by Thaumatog acting as a willing sacrifice outlet to clear away surplus lands until only Mirrorpool remains on the battlefield. Once Mirrorpool is ready, you sacrifice it to copy the very Splendid Reclamation you cast to start the chain, duplicating the sorcery on the stack. When that copy resolves, The Wandering Minstrel completely circumvents the usual drawback of your returning lands by ensuring every single one of them enters the battlefield untapped, ready to tap for mana and restart the entire process.