Sandman, Shifting Scoundrel

The self-scaling green beater is old ground: Multani's landfall clock, any number of *-power bodies that grow with the board. What separates this one is where it reads its size. Its stats do not float on transient triggers or a snapshot of the battlefield; they count your lands, and the graveyard ability quietly makes that count refillable. Pay and it climbs back from the yard alongside a land you had lost, its size set by whatever land count you can muster. That reanimation clause does double work: it is a recursion engine for the creature and a way to reclaim a fetched, sacrificed, or otherwise buried land in the same activation, tapped but real. The evasion is scaled to the ground stalls a lands-matter deck tends to fall into: it can't be blocked by anything with power 2 or less, so the mana dorks and small tokens that clog a green board can't chump it, no matter how large it has grown. It is a threat that gets harder to answer the longer the game runs, and unlike most graveyard-recursive creatures it leaves no exile clause or permanent penalty; the only cost is the flat activation and the tapped land it drags along each time. A midrange piece that turns the land drop you wanted to make anyway into the thing feeding its clock.