D.Gray-man

In a Victorian-tinged world under threat from the Millennium Earl and his army of Akuma — weaponized souls trapped in demonic machines — Allen Walker fights as an Exorcist for the secretive Black Order. Marked by a cursed left eye that reveals Akuma for what they are and wielding an Innocence-powered arm, he and his fellow Exorcists travel the world hunting the Earl's creations before they can spread despair and destruction.