Envelop

Counterspells priced this low always come with a leash, and Envelop's is one of the narrowest ever printed: it answers sorceries and nothing else. The math is brutal in its favor when it connects: one blue mana to nullify a wrath, a tutor, a ramp spell, a haymaker that an opponent has spent their turn casting. The math is zero when the opponent never casts a sorcery at all, which is the entire point of the design. This is the hoser, the hate card, a counter built to be devastating against a specific archetype and a dead draw against everything else. Its target only ever exists on the stack, so the card is purely reactive: it lives in the window between an opponent committing to a sorcery and that spell resolving, and the rest of the time it sits in hand doing nothing. The lineage runs through narrow-but-cheap interaction like Annul, but Envelop sits at the extreme end: the cheapest possible cost paid for the most restrictive possible target. Its honesty is what dates it. Modern counter design tends to hedge, accepting a worse rate for a wider net so the card is never fully blank. Envelop refuses that compromise, and the result is a spell that is either a one-mana blowout or a brick, with nothing in between.