User can control sharpness in any object they touch, either imbuing or taking the quality of sharpness away: sharp edges cut better, while non-edged surfaces, objects, like hands, can be imbued to cut through nearly anything. They can imbue an item as a trap, such as making a doorknob cut anyone who tries to open it, or remove sharpness from things, turning knives and other edged weapons into awkward bludgeons against the user.