The Regressed Son of a Duke is an Assassin / 회귀한 공작가의 막내아들은 암살자 / 回帰した公爵家の末息子は暗殺者 / 重生的公爵家老幺是杀手 / El hijo menor del duque regresado es un asesino / O Filho Regressado do Duque é um Assassino / Le fils cadet du duc régressé est un assassin / Der zurückgekehrte Sohn des Herzogs ist ein Attentäter / Hoegihan Gongjagaui Maknaeadeureun Amsalja

Cyan Vert lived his entire life in the cold shadows, acting as the ultimate hidden blade for his prestigious family. As the illegitimate son of the Duke and the empire's undisputed greatest assassin, he dirtied his hands to pave his brother's path to glory. But devotion only earned him a blade to the throat, courtesy of the very "righteous" brother he served. Just as death's cold embrace was about to take him, Cyan opens his eyes only to realize he has been flung back in time. He is a young boy again, but this time, he carries the lethal instincts, deadly techniques, and cold fury of a master assassin. The days of living as a disposable tool are over. Armed with future knowledge and unparalleled killing arts, Cyan is carving out his own path, and anyone who stands in his way will learn exactly why you never betray an assassin. Strap in for a dark, thrilling ride of strategic vengeance and explosive action where the hunter becomes the ultimate predator.

regression manhwa, fantasy action, assassin protagonist, revenge webtoon, overpowered mc, duke family, medieval fantasy, martial arts, betrayal, rebirth manhwa