[Koopaking]

When you cut someone with a blade you have to really try at it and be able to finish the job. You take the sharp edge and slice it and cut through everything, marrow and all, as quickly as you can. Without a sturdy hand, you'll only make it half way and will need a retry to finish the job while your mark - still fully conscious - lies cut partly open with blood and innards strewn out across the ground. You pull back once more, this time delivering a cut that is straight and true. You feel the blade's resistance against flesh, bone, and muscle as it slices across the torso. Finally, the last strand breaks and your weapon glides effortlessly out of the newly completed incision. The deed is done.

Or just shoot him in the face and call it day.