Intimidation Bolt

Burn spells point at the most threatening creature; this one points at the swing. The 3 damage is the half you can see, killing a small attacker or finishing off a larger one. The clause underneath is the design: by shutting off every other creature's attack for the turn, it stops the whole board cold while the spell clears one body. The window matters, and it is narrower than it looks. A "can't attack" rider does nothing to creatures already declared as attackers, so this is not something you hold to undo a swing already committed; it is a pre-combat answer. Cast it in your opponent's upkeep or first main phase, before the Declare Attackers step, and the alpha strike dies on arrival: one creature dead, the rest pinned for the turn. That separates it from a fog, which kills nothing and prevents only the damage, and from a clean removal spell, which trades for one body while the crackback still connects. Stapling both effects onto one instant lets a deck on the back foot trade a single card for an entire combat phase plus a kill. The cost of squeezing that onto three mana is the timing discipline and the strictly-this-turn duration: no lingering tax, no repeat, and no value if you blink past the right step. A tempo eraser sold as a burn spell.