Show of Confidence
The whole payoff lives in the cast trigger, and it scales with the wrong axis for a combat trick. Most counter-granting instants give you a fixed bump; this one keys off how many other instants and sorceries you've already thrown this turn, so its value curve bends toward decks that were never trying to grow a creature. In a shell built to chain cheap spells, the third or fourth cast of the turn arrives with a stack of copies waiting to land, each free to pick a new target, and suddenly a single one-drop is carrying a fistful of counters and vigilance besides. That is a spellslinger reward wearing a pump-spell costume: the base mode is a fine but forgettable trick, and everything interesting happens in the copy clause, which converts a turn's worth of noncreature volume into permanent, spread-out board presence. The vigilance rider points at intent, letting the enlarged threat swing without dropping its guard, so what looks like a way to win a single skirmish is really a game-closer. The tension is honest, too: you have to spend a turn casting other things before the trigger means anything, so the card punishes the empty board and rewards the storm-adjacent one, a sharper deckbuilding demand than its unassuming counter-and-keyword front half lets on.
