When Starfrost Swirl's Flowfrost Arrow first hits an opponent, or its Rimestar Flare hits an opponent, 1 Detector stack from Passive Talent "Suppressive Barrage" will be generated. You must have unlocked the Passive Talent "Suppressive Barrage" first.
Maybe save up and get the Black Sword or the Black cliff longsword from the glitter shop, both seem...