Ephara's Warden

A pacifier dressed as a creature. The repeatable tap effect is the white interpretation of a long-running design tradition, the Icy Manipulator school of locking down a single attacker or blocker each turn, scaled down to a body that can chump-block in a pinch. The power-3-or-less clause is what pays for the repeatability: this Warden polices small and midsized threats, the swarm of two- and three-drops a defensive deck most needs to slow, but folds entirely against the fatties it would most want to neutralize. That ceiling makes it a tempo tool rather than an answer, since tapping a creature only delays it for a turn and never removes it. The 1/2 frame is the other half of the deal, fragile enough that any burn or combat trick ends the engine, so the card asks to be kept out of harm's way while it grinds down an opponent's attacks one creature at a time. It is the kind of defensive piece built for a control or attrition plan that expects to win slowly, walling off the board while a real finisher does the closing.