I Am My Yandere Disciple's White Moonlight

Jiang Ningbai was the greatest sword cultivator in the world. She was also a looming shadow in the hearts of countless sword cultivators. She was also a shameless master. Her disciples generally had only two chances to see her: Once when they joined her sect, and once when they graduated. So much for the saying, "A master opens the door, but the disciple must walk the path alone." [leans back tactically] Yet all three of her disciples went on to achieve great things: Her taciturn eldest disciple became the Demon Lord, ruling the Ten Directions of the Demon Realm. Her second disciple, who excelled at the art of ruling, became emperor of the largest dynasty in the mortal world. Even her third disciple, a peacock who had nothing but his looks, became a ruler of one corner of the Demon Realm. * One year, the Heavenly Gate opened wide, and demonic outsiders invaded the cultivation world. Using her sword bones as a medium, Jiang Ningbai transformed into a sword candle. She annihilated every last demonic outsider, but the price was the destruction of all her cultivation and the loss of her sight. She had offended too many people over the years. Now that she had fallen from power, just as a crowd of old and young were about to gang up on her without honor, someone in dark robes, holding a black umbrella, slaughtered his way from the foot of the mountain to the main hall. With an elegant smile, he said, "Master, I've come to take you home." His tone was utterly unhinged, and his actions even more so. Jiang Ningbai fell silent for a long while. Then she asked the question on everyone's mind: "...Excuse me, who are you?" The male lead is the eldest disciple, an unhinged yandere, and truly, truly insane. The female lead is irresistible to everyone. Even in death, the fragrance of a hero's spirit lingers. Theme: Even in death, the fragrance of a hero's spirit lingers.