Themberchaud
Themberchaud is an Adult Red Dragon and was the Wyrmsmith of Gracklstugh.
Being the Wyrmsmith meant Themberchaud was supposed to light the fires of the Forges of Gracklstugh each day, becoming the driving power to the City's wealth. Every morning, Themberchaud made its round around the City and enflamed each of its major forges in flames, keeping the city ablaze and visible from far away.
Themberchaud's needs were tended to by the Keepers of the Flame, under the leadership of Gartokkar. The Keepers were able to create a Dragon Egg from Themberchaud without needing a mate. Unknown to Themberchaud however, the Keepers intended to replace him with the Red Dragon Wyrmling that would hatch out of the egg.
During the Derro Unrest in Gracklstugh, the Egg was stolen. The Keepers of the Flame recruited The Party to retrieve the egg from the Whorlstone Tunnels, which they managed to do. However, since The Party, especially Drathuul, were quite impressed they decided to tell Themberchaud the truth about the intention of the Keepers: They intended to hatch the egg and replace Themberchaud with the Wyrmling.
Instead, The Party hatched the Wyrmling and named him Firestarter, dealt a serious blow to the Keepers and returned Firestarter to Themberchaud. Enraged, Themberchaud turned on the City of Gracklstugh in the midst of the Derro uprising and started to burn Gracklstugh to a crisp. While The Party escaped, most of Gracklstugh was laid to waste in what would later be called the Blaze of Gracklstugh.