The party returns to Waterdeep where Lady Silverhand meets them and promptly tells them they have a extremely important quest - to attend a meeting of the five metallic dragon races. The party's goal is to persuade the dragons to act in concert with the humanoid factions rather than on their own. The party is introduced to three humanoids who transform into an ancient silver dragon, an adult gold dragon, and a bronze dragon. The party has been granted the boon of riding the dragons to the meeting of the dragons and they set off at once.
During the second day of travel, the chromatic dragons and dragon riders emerge from the clouds and strike! The cult is trying to stop the heroes! With the stakes high, the heroes fearlessly engage the adult red, adult blue, and ancient white dragons and their cult riders, including Galvan the Blue Wyrmspeaker. The aerial battle is epic, with powerful breath weapons and spells being deployed by both sides. When the blue Wyrmspeaker falls, the blue dragon exits the fray, giving the advantage to the heroes. When the heroes slay the ancient white dragon, the red dragon quickly flees, allowing the heroes to proceed on toward the dragon council.
Once there, the heroes are brought before five ancient dragons, one for each metallic dragon race. The party listens as each dragon explains what it thinks is the wisest course of action. Initially, most of the dragons are in favor of independent action without the humanoids. There were some rough moments (like when Dain is accused of being a thief), but through the wise use of diplomacy, concessions, and, let's face it, bribery, the party slowly sways the mood of the dragons.
Ultimately, the dragons vote to ally themselves with the humanoids in fighting the evil dragon cult. Additionally, the party will be able to assign one flight of each color metallic dragon to protect human settlements or otherwise assist the factions prior to the final battle.
In fact, the party has so successfully swayed the dragons that they are each granted one magical item from an ancient dragon's personal magical hoard. Mullyn is given an incredibly powerful staff of power. Dain is giving a Dwarven Thrower; Roscoe is given Glamoured Studded Leather +2; and Oloril is giving a Manual of Quickness of Action (to replace the one unfairly used by Kaelthiros), a arrow of blue dragon slaying, and the head of the ancient white dragon, Aveiturace, who fell in the aerial combat.