Berserk

Guts, the Black Swordsman, wanders around in a mediaeval world slaying demons as they are attracted to a demonic mark on his neck. To his help he has inhuman strength gained from a harsh childhood lived with mercenaries, a gigantic sword, an iron prosthetic left hand and the elf Puck. In his search for vengeance on the one who gave him the mark, he meets many interesting people and creatures, whom all is affected by him in one way or another.

English translation of the Japanese manga Beruseruku.