Thassa's Rebuff

Most counterspells with a variable tax peg X to your mana left open or your opponent's spell, the kind of bookkeeping Mana Leak and Daze trade on. This one ties the tax to a board state you are already trying to assemble: every blue pip on your permanents is a point your opponent has to pay around. The design pulls in two directions that usually fight each other. A pure counterspell wants you holding up mana and committing nothing; a devotion deck wants you slamming permanents and tapping out. Here the second behavior is what arms the first. The more blue symbols you have already resolved, the harder this becomes to play through, so the counterspell scales precisely as your deck's other plan comes online. That makes it a strange creature in the soft-counter lineage: not a tempo tax that gets worse as the game goes long, but one that gets better, since devotion accumulates rather than decays. The risk is the same as any devotion payoff. On an empty board it counters nothing of consequence, an awkward hold against the very aggressive starts a control hand most wants to stop. Its window is the midgame turn when you have a couple of double-blue permanents down and want to defend them, a moment when a two-mana spell asks for a four or five mana payment.