The Regressed Son of a Duke is an Assassin is a dark fantasy manhwa centered on a master assassin who forges a new destiny on a foundation of ultimate betrayal. Cyan Vert was the continent’s deadliest shadow, an unwaveringly loyal assassin who met his pitiful end not in battle, but by the dagger of the brother he trusted most. As he takes his last breath, his only thought is a vow: if given another chance, he would live only for himself, trusting no one and serving no master. Fate grants him that precise wish, sending him back to his youth as a noble duke’s son. Now, this once-loyal dog for others is gone, replaced by a cold, calculating strategist who will seize everything he desires with his own two hands, letting nothing and no one stand in his way. This is a top-tier recommendation for fans of ruthless protagonist manhwa, noble house politics, magic and sword cultivation, and regressor stories like The Heavenly Demon Can’t Live a Normal Life where the focus is on absolute self-reliance and ambition.

Keywords: The Regressed Son of a Duke is an Assassin manhwa, ruthless noble regressor, assassin second chance story, Cyan Vert revenge, dark fantasy political webtoon.

Meta Description: Betrayed by his brother, the continent's greatest assassin regresses as a duke's son, vowing to live only for himself and wield his power without serving anyone ever again.

Alternate Titles: The Regressed Son of a Duke is an Assassin / 회귀한 공작가의 막내는 암살자 / 회귀한 공작가의 차남은 암살자