Swift Silence

The "all other spells" clause is the whole gambit: this is a counterspell you only want to cast into a stack already stuffed with the opponent's intentions. Where a standard counter trades one card for one threat, this one waits until a control mirror is mid-exchange, or until an opponent dumps a hand of cheap spells, then sweeps every other pending spell and refills your hand by the same count. The reward scales with their commitment, which inverts the usual incentive: the more aggressively the opponent leans on the stack, the better your blowout. But read the clause precisely. "All other" means everything but Swift Silence itself, including your own spells already on the stack, so you cannot use it to protect a threat you have sitting underneath; a flurry you counter takes your own contributions down with it. And it answers spells only, not abilities or triggers, so a storm line built on copy spells gets swept while a line built on stacked triggers walks right past it. The cost is the catch and the calibration. Five mana at instant speed asks you to hold up nearly your whole turn for a window that may never open; against a single threat per turn it counters one spell and replaces itself, an expensive Cancel that drew a card. It rewards a reading of the game state more than a deckbuilding slot: a blue-white control answer built for the moment opponents overextend into open mana, not for the durdling midgame where nothing is on the stack to punish.