Koun-chi 999 no Watashi, Sokushi Mahou ga Zettai ni Seikou suru no de Sekai Saikyou desu ~ Mahou-chi 1 de Tsuihousaremashita ga, Kakuritsu Cheat de Moriagaru ~ is a Manga/Manhwa/Manhua in (English/Raw) language, Adventure series, english chapters have been translated and you can read them here. You are reading chapters on ManhwaZ fastest updating comic site. The Summary is
Born into a prestigious family of magicians, Sachi faced despair when her magical power was assessed at a mere 1. In contrast, her luck stat was an astonishing 999, but to magicians, it was deemed worthless—?