Blood-Sucking Weapons are a type of weapon mass produced by the Dragoon Laboratory for use in Operation: Jacob's Ladder. While the weapons vary from blades and bows to more modern armaments such as pistols and shotguns, each is identifiable by the stylised cross emblazoned on it. When a demon is killed with these weapons, their blood is absorbed into it in the form of red glints of light which strengthens the weapon.
When a certain chant is used, the collected blood can later be released from the weapons.
|Melee Weapons||Bayonet • Caliburn • Fang • Giant Compass • K'rik • Kunai • Kurikara • Maken • Tokkosho • Wooden Sword|
|Ranged Weapons||Flamethrower • Grimoire • Pistol • Rifle • Shotgun|
|Explosive Weapons||Bazooka • Holy Water Grenade|
|Other||Blood-Sucking Weapon • Messiah|