When a pixie fires an arrow from any bow, it can decide to change the arrow's properties by sprinkling it with magical pixie dust. Doing so is a free action as long as the pixie is the one who fires the arrow. A pixie can generate a number of uses of dust equal to its Charisma score each day (16 uses per day for most pixies)-the dust is useless to another creature unless the pixie gives the dust freely. In this case, the pixie chooses what effect the dust will have on an arrow when it is applied, and it takes a standard action to apply the dust to the arrow. Once pixie dust is applied to an arrow, the pixie's chosen effect persists on the arrow for only 1 round. As long as an arrow is altered in this way, it does not inflict damage when it hits-it only causes its new effect. A pixie can choose any one of the following three effects when dusting an arrow. Save DCs are Charisma-based.