Dovescape

Most prison pieces tax. This one transmutes. The hybrid pips mean it never demands both colors at once: either symbol can be paid with white or blue, so a deck leaning hard into one of the two can still cast it. But the body of the card is the conversion clause, not the casting cost. Every noncreature spell either player casts gets countered, then refunded to its caster as a flock of flying tokens scaled to what that spell cost. The effect is symmetrical, which is the whole tension, because the same lock that freezes an opponent's removal, burn, and counterspells freezes your own. A creatures-only board state is the price of admission. What makes the symmetry survivable is that the tokens are not a consolation; they are a tempo and board swing, handing each caster fliers in exact proportion to the mana they sank into a spell that no longer resolves. A six-mana board wipe becomes six 1/1 fliers for the player who tried to cast it, which means the strategy already built around creatures barely notices the cage while the spell-heavy deck across the table watches its game plan dissolve into birds. It rewires the decision tree of every turn: interaction stops being interaction and becomes a payment in flying chump blockers. That is the rare stax piece that asks not "can you pay" but "are you built to live inside a world where instants and sorceries simply do not happen," and the deck full of them almost never is.