Murasa Rootgrazer

Land drops as a repeatable resource, packaged into a body that also blocks and swings. The first tap ability turns a stalled hand full of lands into an accelerant, dropping an extra basic each turn without the fanfare of a ramp spell; the second is the quieter half, bouncing your own basic back to hand so it can be replayed later. That bounce reads defensively at a glance, but it is what refills the hand once you have run out of lands to put down: with an empty hand, tap to return a basic from the battlefield, and next turn the first ability has something to put into play again. The two halves trade off (you spend the creature's tap on one or the other each turn, never both), which is the ceiling on the whole engine. The basics-only restriction is the other limit: no dual-land recursion, no fetchland tricks, just basic lands cycling through the same taps. It plays cleanly with anything that cares about lands entering, feeding those triggers on your terms rather than waiting for a natural draw. Vigilance is the tell that this was built to attack and still hold up its abilities, since the value comes from tapping the creature itself, and a body forced to choose between blocking and ramping mostly ramps. What you get is a green-white utility creature that treats basics as a renewable resource, sitting between a mana dork and a landfall enabler without fully committing to either.