I Butchered My Way to Power

Harvey, an outcast of Astral Sword Sect with shattered sword bones, becomes a butcher. Awakening a system that lets him cultivate through slaughter, he rebuilds his path with pig-butchering.

Recruited by Princess Fiona, he hides his power, defeats foes and the sect's top disciple, seizes fortunes in the Sword Tomb, and slays a demon. Finally, he avenges himself, rejects leading the sect, and leaves with Fiona.