In Highschool DxD Season 2 Episode 5, Sona and her team form a barrier surrounding the school while Rias and her team prepare for their battle against Kokabiel, Freed and Valper. The battle begins with Kokabiel summoning several Cerberus demons to battle the Gremory Team, which the Gremory Team successfully defeats with the help of Xenovia. During that time, Valper successfully combines the four Excaliburs while triggering a self-destruct magic circle that will activate in 20 minutes as a mysterious young man looks on from afar. Rias and Akeno then attempt to battle Kokabiel but prove useless against his powers. Meanwhile, Kiba confronts Valper and learns the truth of the Holy Sword Project. With the help of his friends from the past and present Kiba successfully attains his Balance Breaker, and together with Xenovia who summoned her Durandal they successfully destroy the Fused Excalibur. After Freed and the Excalibur are defeated, Kiba attempts to kill Valper only for Kokabiel to deal the killing blow. The episode ends with Kokabiel confidently telling the Occult Research Club that Issei can transfer his power to anyone as Issei prepares to transfer his powers to Rias.