(p/b) jujutsu kaisen (volume 18)

To gain the power he needs to save his friend from a cursed spirit, Yuji Itadori swallows a piece of a demon, only to find himself caught in the midst of a horrific war of the supernatural! In a world where cursed spirits feed on unsuspecting humans, fragments of the legendary and feared demon Ryomen Sukuna have been lost and scattered about. Should any demon consume Sukuna's body parts, the power they gain could destroy the world as we know it. Fortunately, there exists a mysterious school of jujutsu sorcerers who exist to protect the precarious existence of the living from the supernatural! In order to thwart the culling game, Itadori needs the help of Kinji Hakari, a third-year who is currently suspended from Jujutsu High, so he decides to participate in an underground fight club where Hakari works as a bookie. Meanwhile, Fushiguro infiltrates the fight club and heads for Hakari's base of operations, but another Jujutsu High third-year is using their cursed technique to block his way! (From the publisher)