Walking Sponge

The joke is in the creature type: a Sponge whose job is to soak up keyword abilities, one at a time, from whatever it points at. The design is a study in narrow, repeatable interaction. It cannot kill anything, cannot block well, and only strips three specific keywords, but it does so every turn for one tap, which makes it a recurring tax on whatever the opponent's plan depends on. Against a flier holding the air, it grounds the threat for a turn; against a first-striker, it levels the combat math; against trample, it lets a chump block actually chump. The keyword-removal mechanic is a precursor to a small tradition of "ability shutdown" effects that sidestep removal entirely: rather than answer a threat, you answer the property that makes it dangerous. The catch is the one every tapper carries: it sits idle until it can shed summoning sickness, and a single removal spell trades up against a 1/1 that has only blanked one keyword once. The repeatability is what earns it the slot, since over several turns it can neutralize a key creature's relevant ability every combat, which is a different axis of value than a one-shot trick. It is a tool built for a specific texture of board stall, where the difference between a creature with flying and one without is the whole game.