The Demon Lord Rebuilds, I Want to Slaughter All the Heavens

[No system + revenge + massacre + decisive killing + evil + single female protagonist + invincibility] On this day, the forbidden land shook, and black mist poured out from it, covering the entire galaxy. An extremely cold voice also resounded throughout the entire forbidden area. "What is good and what is evil?" "The way to destroy me is to kill those I love." "Hehehehe... I want you all to be buried with me..." The Demon Lord, who had been sealed for ten thousand years, appeared in the Southern Continent Divine Sword Sect. On this day, the Divine Sword Sect suffered a great disaster for tens of thousands of years...