D.Gray-Man Vol 1

D.Gray-man by Katsura Hoshino. A Shonen manga rated Older Teen, published in English by Viz Media.

In an alternate 19th-century Europe, young Allen Walker, an Exorcist with a cursed left eye and a weaponized left arm, battles the Millennium Earl and his Akuma, monstrous weapons built from human souls. A gothic dark fantasy.