Stratus Dancer

A flash counterspell announces itself the moment you leave two mana untapped: the opponent reads the open window and simply waits you out. This design solves that problem by burying the permission inside a body. What sits across the table is an anonymous morph, a nondescript facedown creature no different from any other, until the instant or sorcery you meant to stop is already on the stack. Megamorph converts the reveal into the answer: pay the flip cost, turn it up, and the trigger counters the spell in flight, leaving a 3/2 flier behind once the mask comes off. The restraint here is narrow scope: it answers only instants and sorceries, never a permanent, and the permission is welded to the flip rather than held in reserve, so a turn with nothing worth stopping just leaves you a plain 2/2 owed its flip cost. The real value is the information gap. Every relevant spell the opponent casts has to respect a hard counter that may or may not be waiting, while you alone know on their turn whether the morph is a clock or a trap. It folds conditional permission into a tempo creature without ever declaring which role it is playing: not a threat and an answer bolted together, but a single card that becomes whichever one the moment demands.