Sister Seems to Want to Destroy the World

'''[Title and synopsis pending, but the premise and character settings are finalized.] For centuries, Qi Zhi couldn’t figure it out. As a worthless little weed with a damaged spiritual root, neglected by her entire sect, why did her second senior sister treat her so well? No matter how others looked down on her, the senior sister cradled her with utmost tenderness, indulging and pampering her in every way. Qi Zhi believed no one in the world could ever treat her better than her second senior sister. So even when everyone claimed her senior sister’s spiritual root had long been ruined—that no matter how peerlessly talented she once was, she was now nothing but a useless waste—Qi Zhi still...