Whip Vine

A flying-creature jailer dressed up as a wall. Most defensive reach creatures stop at the block: they trade their toughness for a turn and let the attacker swing again next combat. This one adds a second clause that turns blocking into a soft lock. The activated ability taps a flyer it has already blocked, and the optional-untap line on the Plant is what makes the lock stick: by choosing to leave the wall tapped, you hold the targeted flyer down indefinitely. The cost is real and self-imposed. To keep one flyer pacified, you sideline a 1/4 body, and the moment you want that blocker back you release the prisoner. The whole card lives in that trade: a soft Pacifism on a single evergreen flyer, paid for in lost defensive coverage rather than mana. It is a narrow, deliberately fiddly answer from an era when green's interaction with flying meant either a big-toughness wall or nothing, and Wizards was still experimenting with creatures that traded their own untap step for an ongoing effect. The result is less a blocker than a tether: it asks you to decide, every untap step, whether the flyer it has grounded is worth more pinned than the wall is worth free.