Revolutionary Rebuff

A soft counter built with a deliberate blind spot: it answers everything except the card type it was surrounded by on release. The math is the familiar -tax shape that Quench and Miscalculation established, two mana to force the opponent to spend two more, tempo that only holds in the early turns before they have mana to spare. The exclusion clause is where it diverges from those. It cannot touch artifact spells at all, which in a permission-rich environment runs exactly backward from what you want: the threats worth countering wear an artifact type line, and the counter politely declines to look at them. Against a deck casting two or three artifacts a turn, the card is half-blind by construction, useful only against the nonartifact spells the opponent happens to cast. Strip the artifacts out of the metagame and the restriction stops mattering, at which point it functions as a serviceable early-game Mana Leak variant priced one tax-tier softer. The artifact carve-out is the price the design pays for existing where artifacts were everywhere; it is also the reason the card never travels well, since its relevance is tied entirely to how much of the field it is structurally forbidden from answering.