My Sister Poisoned Me Into a Demon; Reborn, I Reclaim My Life

My ascension failed. I fell to the demonic path, and for five full centuries I was sealed beneath the waters of the Eastern Sea. Just as I was on the verge of having my soul scattered, my spirit slipped free of my body, and I saw my elder sister, Lucienne, instructing her own children. "As long as you reach your goal, what does it matter what means you use?" "Your mother became the Flower Goddess only by taking the place that should have been your aunt's."