Blue Exorcist, Vol. 31Rin and his exorcist classmates are caught in a secret war against the forces of darkness. The Knights of the True Cross begin their attack on Satans fortress in a coordinated assault. The lord of demons summons the powerful Asmodeus, the King of Lust, who relishes the chance to take on Shura. Osceola squares off with Amon, who doesnt think much of the exorcists efforts. The battle provides an opportunity for Rin and Yukio to breach the gate, but