The Saintess Decided to Become the Destruction King

<Introduction to the Work> “Mirope, I’m becoming a goddess thanks to you.” For nearly ten years, I lived as Saintess Roselina's mana battery without knowing why. Just before my death, I learned the reason Roselina was doing this, defining her as a 'crazy bitch, not a saintess.' With that memory as my last, I regressed to 14 years before my mana bloomed. Determined not to be used by Roselina and the Papal State this time, I try to win over the Hartmann Dukedom, the biggest source of funding that allows Roselina to maintain her position as a saintess. [The way Roselina treated the young duke wasn't mana. I know how that woman improved his condition.] [I can heal the young duke.] The dea...