Read Manhwa Legendary Youngest Son of the Marquis House online in English. Also known as Jack Be Invincible, Hujakgaui Yeokdaegeup Mangnaeadeul, 후작가의 역대급 막내아들, The Margravial Household’s Phenomenal Youngest Son, The Marquess’s Youngest Son, and The Youngest Son of a Marquis.

Jack Valantier, the youngest son of a powerful noble house, once lived surrounded by cruelty, neglect, and enemies wearing the faces of family. After clawing his way through bloodshed and finally taking revenge against the empire that ruled the continent, death should have been the end. Instead, Jack opens his eyes in his fourteen-year-old body, back before everything was taken from him.

This time, he is not the weak child everyone remembers. With a lifetime of battle experience and bitter regret behind him, Jack moves through noble politics, old grudges, loyal bonds, and looming war with a sharper purpose: protect what matters, crush those who deserve it, and rewrite the fate that once destroyed him.

This series may appeal to readers who enjoy regression fantasy, revenge action, and noble family power struggle stories.