I am Invincible with My Luck Stat at 999 and Infallible Insta-Death Magic: I was Banished with a Magic Power of 1, but I Rise to the Top with My Probability Cheat

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—?