The Old Satan Faction (ж—§й”зЋ‹жґѕ, KyЕ«maЕЊ-ha) was the largest faction of the Khaos Brigade which consisted of the Devils who were descendants of the original Satans: Beelzebub, Leviathan and Asmodeus such as Shalba Beelzebub, Katerea Leviathan and Creuserey Asmodeus. Formerly led by Ophis, who served as a figurehead.

The Khaos Brigade was a loose knit association of various supernatural beings who were dissatisfied by the growing alliance of various mythological powers and sought to plunge the world into chaos. The Khaos Brigade officially came to an end when Qlippoth was finally defeated in theВ the Evil Dragon War. In Volume 21, the trio of 666 and the two Evil Dragon leaders caused great destruction, almost completely decimating Heaven, Grigori, and Asgard, killing many Gods in the process and soon after, began attacking Europe and Japan in the Human World. In Volume 20, 666 was successfully awakened when Rizevim after death, used his soul to awaken the beast and it, along with the Evil Dragons Apophis and AЕѕi DahДЃka who had betrayed Rizevim taking control of Qlippoth, set out to attack the mythologies. A new faction called Qlippoth was created and this faction planned to use the Sephiroth Graal to revive the Evil Dragons who are feared by every mythology. He planned to reach the other world by having Apocalyptic Beast 666 (Trihexa) fight the Apocalypse Dragon Great Red. In Volume 16, during the Vampire Civil War, it is revealed that the Son of the Original Lucifer, Rizevim Livan Lucifer, became the new leader of the Khaos Brigade.

In Volume 14, Azazel revealed that there was someone who was trying to unify the remnants of the Old Satan Faction, Hero Faction, and Magician Faction. This led Azazel into speculating that the other factions of Khaos Brigade that had been lurking in the shadows, would soon arise and take action. As such, Ophis did not lose most of her powers.ДЄs of Volume 12, the Khaos Brigade's two largest factions were greatly weakened by the loss of their leaders and various members. However, Ophis released her powers in the form of snakes before Cao Cao came to steal her powers. This has resulted in the latter remaining in a presumed powerless state. In Volume 11, the Hero Faction betrayed their leader Ophis after Cao Cao, the leader of the Hero Faction, sided with Hades, the God from the Realm of the Dead, and used Samael to steal most of her powers under the intention of creating another Ophis. Shortly after that, the Khaos Brigade began to start many terrorist attacks, such as attacking the VIPs during Rias' Rating Game against Diodora, kidnapping the Youkai leader, Yasaka, and committing many other atrocious acts. The Khaos Brigade first appeared in Volume 4, introducing themselves to the world and attacking the leaders of the Christian religion's Three Factions. At some point, it was handed to Ophis, the Dragon God of Infinity, who had the sole purpose of removing the Great Red, one of the most powerful Dragons in existence known as the True Dragon, out of the Dimensional Gap. Originally founded with the purpose to create an opposing force to the growing alliances of mythologies, the Khaos Brigade was built as a cooperation between the Fallen Angel Satanael and the Wizards of Oz.

The chaos brigade