Fierce Retribution⁣ - Innistrad: Crimson Vow⁣ (Common)⁣ [13]

Fierce Retribution is an instant that allows you to destroy a target creature that’s currently attacking when you cast it for its regular cost of {1}{W}. If you want to use the cleave ability by paying {5}{W} instead, you can destroy any creature, regardless of whether it's attacking or not. This flexibility makes it a solid choice for dealing with threats, especially in a pinch, but the higher mana cost for the cleave option can be a downside if you're low on resources.