Snake Pair: Ouroboros

Snake Pair: Ouroboros (蛇双・ウロボロス) is an Arch-Enemy Event Weapon in the shape of a black snake head attached to a never-ending chain. It is wielded by Hazama, previously by Yūki Terumi and Kazuma Kval.

Ouroboros can directly attack the mind and psyche of the victim. Hazama uses this ability once to unlock Tager's memories of the massacre happening during the Event Weapon Dispossession Operation.

Trivia

 * The Ouroboros is the symbol of a serpent, or less-commonly a dragon, eating its own tail, personifying the eternal cycle of life and death, as well as infinity itself.