The Ritual Chamber is a cave that was an invention of the Order of Ixis, apparently developed during the time of the Forgotten War. It was designed and used to amplify the powers of an Ixian magician, enabling each of them to cast more powerful spells.
One such chamber was beneath the headquarters of the Council of Acorn, where the sorcerer Ixis Naugus prepared his plan to hypnotize the Council of Acorn members through the Eldritch Rites to establish a new Order of Ixis. It is accessible through the pit that was created when the Battle Bird Armada destroyed Castle Acorn. In order to add to the chamber's power, he dispatched his apprentice Geoffrey St. John to Soumerca in order to retrieve the bones of Ixis Vale, a fallen subordinate of Mammoth Mogul. The chamber's existence and location was discovered by Elias Acorn, Leeta, and Lyco of the Secret Freedom Fighters, and it's purpose was revealed to their team by Geoffrey after he learned of his master's monstrous plans.
Three members of the Secret Freedom Fighters—Elias Acorn, Leeta and Lyco—found the Ritual Chamber by following Ixis Naugus while he was walking around New Mobotropolis. Leeta and Lyco followed Naugus while Elias set a bomb to help them escape (the entrance had been magically sealed behind them when Naugus walked away). Leeta accidentally revealed their presence by screaming when she saw Naugus' new mutation. Although Elias managed to find the twins, they were hit by the wizard just before escaping, and they fell into the pit.
Shortly afterwards, Geoffrey St. John brought the bones of Ixis Vale to Naugus in the Ritual Chamber. Naugus revealed to Geoffrey that he planned to use the bones to cast a spell to take control of the Council of Acorn. Shocked, Geoffrey said that such an act could lead to chaos and argued with Naugus not to proceed. Naugus, however, wanted to that to happen to New Mobotropolis.
Before Naugus could cast his spell, the Secret Freedom Fighters—Elias, Leeta, Lyco, Silver, and Shard—burst in. During the fight takes place, Ixis Vale's bones were turned to dust by Shard's cannon, and Naugus caused a big fire that destroys parts of the Ritual Chamber. With the spell destroyed and their mission complete, the Secret Freedom Fighters escaped the chamber. Geoffrey would have escaped with them, but Naugus, pleading for mercy, hypnotized Geoffrey to stay behind and he was sealed in the chamber along with the wizard after the battle.