Vinland Saga, Book 6

From the makers of Attack on Titan. As a child, Thorfinn sat at the feet of the great Leif Ericson and thrilled to wild tales of a land far to the west. But his youthful fantasies were shattered by a mercenary raid. Raised by the Vikings who murdered his family, Thorfinn became a terrifying warrior, forever seeking to kill the band's leader, Askeladd, and avenge his father.