Graceful Antelope

Most landwalkers ask you to hope the opponent runs the right basic; this one manufactures its own evasion. Connect once, and the combat-damage trigger turns any land into a Plains for as long as the Antelope sticks around, which means the very swing that lands sets up every swing after it. The 1/4 body is the tell about intent: it is built to survive blocks it will never have to face, a defensive frame on an offensive engine. The conversion is also a quietly nasty toolbox effect outside of pushing damage, since turning a key dual or utility land into a Plains can strip a color or shut off a land's text, with the change reverting only when the creature leaves the battlefield. The clean restriction holding it together is the "until this creature leaves the battlefield" clause: the lock is real but tethered to the body, so removal undoes the whole arrangement at once and there is no permanent damage to the board. It is a self-contained evasion puzzle that solves itself after the first hit, the rare landwalk creature that does not depend on its opponent's manabase to do its job.