Chroma Conclave

The  was a faction of five chromatic dragons confronted by Vox Machina. The blue dragon, Brimscythe, was defeated pre-stream; the remaining red, green, white, and black dragons were major villains over the course of Arc 3 in Campaign One (episodes through ).

Compelled Union
During Thordak's imprisonment in the Elemental Plane of Fire, he was approached by Raishan, the ancient green dragon cursed with a horrific disease that was slowly disintegrated her. Thordak claimed to know of a cure, which he promised to share, but if only Raishan would release him, and help conquer the city of Emon to enact his revenge. Raishan proposed the idea of the Chroma Conclave — an alliance of powerful chromatic dragons to aid them: Brimscythe, Umbrasyl, and Vorugal, who were promised rule over a city of their own with Emon shared by both Brimscythe and Thordak.

Brimscythe
The young blue dragon Brimscythe had infiltrated the Tal'Dorei Council, taking the guise of a human named General Kreig and the position as the Master of Law. As General Krieg, Brimscythe thwarted an assassination attempt against Sovereign Uriel Tal'Dorei II in early 810 PD, which was carried out as part of a demonic incursion. It is unclear what part Brimscythe played in this incursion and whether he was directly involved. During their investigations into this incursion, the adventuring party called The S.H.I.T.s, later known as Vox Machina, investigated General Krieg's house, finding a teleportation circle leading to Brimscythe's lair in the Cliffkeep Mountains. The dragon fought against Vox Machina, nearly devouring several members of the group, but was eventually slain by Vax'ildan. In his death throes, Brimscythe thrashed about the cavern, knocking down several support pillars and causing the roof to collapse. Vox Machina barely escaped back through the teleportation circle. However, the group managed to notice four obsidian orbs on a cavern wall that the Chroma Conclave used to communicate with each other. One of the orbs was touched and a massive, scaly eye appeared within, proclaiming "Intruders. I know your face now. He is a fool, and so are you, insect". Then all four orbs simultaneously cracked, and became inert.

Ultimately, Brimscythe's death was convenient for the Conclave, as the overly ambitious blue dragon was vying for control of Emon. Thordak wouldn't've allowed that, and was planning to kill the younger dragon himself.

Thordak's release
In 806 PD, Raishan infiltrated the Fire Ashari village of Pyrah, which is built around a portal to the Plane of Fire. There, she took the guise of a young humanoid girl, and was accepted into the Ashari. There she researched the Plane of Fire. In order to facilitate Thordak's escape, Raishan formed an alliance with a number of fire giants ousted from the City of Brass. With their help, they encased a bit of the Fire Plane, called the Ember Seed, into the soul anchor in Thordak's chest. This is what would allow him to leave the Plane of Fire. She planned to wait until a Celestial solstice to enact the plan, but seeing Thordak's deteriorating mental state due to the Ember Seed now embedded in his body, she accelerated the plan.

On 20 Duscar, 810 PD, the day of Winter's Crest, Raishan widened the rift to the Plane of Fire in Pyrah. Thordak, the soul anchor embedded into his body, tore through the rift, razing Pyrah as he went. Leaving the devastation behind, he and Raishan rendezvoused with the other members of the Conclave, and set their sights on Emon.

Chroma Crisis
The Chroma Conclave invaded Emon, destroying most of the city. The city was subsequently occupied by Thordak, who claimed the surrounding Bladeshimmer Shoreline as his domain and took the Cloudtop District in Emon as his lair.

Umbrasyl attacked Westruun and the Dividing Plains and allied with the Herd of Storms, but made his lair in Gatshadow, draining the remaining residents from their valuables. Raishan did not claim new territory during the Chroma Crisis, but her lair was within the Rifenmist Jungle and on Island of Viscan. Vorugal supported by the Conclave destroyed Draconia, considered to be a priority target for unduly tracking the dragon's movements, and then made his lair among the ruins.

Legacy
Thordak's Crater in the Cloudtop district became a breeding ground for cinderslag elementals, and the expanse of farmland to the east of the city was torched by the dragon and corrupted by his elemental energy, unable to regrow. This land became known as the Scar of the Cinder King. In order to combat this, the Tal'Dorei Council reached out across the Ozmit Sea to the Fire Ashari. While they were still recovering from their own decimation at the hands Thordak, the Fire Ashari obliged and set up a base, Flamereach Outpost lead by the firetamer Lorkathar, to help contain and eventually heal the Scar. In 842 PD, over thirty years after the Chroma Conclave's attack, the Scar had yet to entirely heal.

On the one-year anniversary of freedom clatched from Umbrasyl's grasp, a statue of Westruun's founder Palest Westruun was, mockingly named the Black King. Both the city and the statue were blessed by a High Priest of the Lawbearer and when the city is threatened, the statue is supposed to animate into a stone golem and defend the people of Westruun.

Members

 * Raishan, the Diseased Deceiver (ancient green dragon; killed by Kerrek, Vox Machina, and their allies)
 * Thordak, the Cinder King (ancient red dragon; killed by Vox Machina and their allies)
 * Umbrasyl, the Hope Devourer (ancient black dragon, killed by Vox Machina and Shale)
 * Vorugal, the Frigid Doom (ancient white dragon, killed by Vox Machina and Raishan)
 * Brimscythe, the Iron Storm (young/adult blue dragon, killed by Vox Machina)

Trivia

 * Raishan is the only member of the Chroma Conclave to have been defeated by a guest character, Kerrek; her four colleagues were killed by members of Vox Machina: Vax'ildan (Brimscythe and Thordak), Vex'ahlia (Vorugal), and Grog (Umbrasyl).
 * She is also the only member who survived the episode that shares her name ("Raishan" (1x80)), whereas Umbrasyl, Vorugal, and Thordak were all killed in their respective episodes ("Umbrasyl" (1x55), "Vorugal" (1x71), and "Thordak" (1x79)).