Mirrorpool + Splendid Reclamation + Lithatog + Archelos, Lagoon Mystic

Mirrorpool

Splendid Reclamation

Lithatog

Archelos, Lagoon Mystic

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 Lithatog 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 Archelos.
7. Repeat from step 2.

This intricate loop turns your graveyard into an engine by leveraging Lithatog to clear away excess lands until Mirrorpool stands alone as your final sacrifice. Once you pay to have Mirrorpool copy Splendid Reclamation, the stack yields a fresh wave of resources while Archelos, Lagoon Mystic ensures every single returning land enters the battlefield untapped instead of tapped. This influx of mana and permanents lets you repeat the entire process indefinitely, growing your Lithatog to staggering proportions while generating infinite landfall and magecraft triggers.