Nullify

Counterspells live and die by what they refuse to answer, and this one carves out an oddly specific exclusion zone: creatures, yes, and Auras, but nothing else on the stack. The Aura clause is the tell. Most narrow counters of this stripe stop at creature spells, treating enchantments-on-permanents as someone else's problem; folding Auras into the same window is a quiet acknowledgment that a creature spell and the Aura you slap on a creature are the same kind of board commitment, the same axis of threat. The double-blue cost is the price of that focus. Where a generically-costed counter sells flexibility, this one demands you already know what you came to stop, and the reward for that commitment is hard, unconditional denial against the one or two card types it cares about. The design only makes sense when creatures and their attachments are doing the heavy lifting: a scalpel built for board-based matchups, useless against the burn spell or the planeswalker, lethal against the thing trying to get under your removal by resolving a body. The constraint is the whole proposition. You are not paying two blue mana for a counterspell; you are paying it for permission to leave the rest of the stack alone.