Blaze of Gracklstugh
After The Party returned from the Whorlstone Tunnels beneath Gracklstugh and had recovered Themberchaud's egg, hatching a Red Dragon Wyrmling they named Firestarter, they explained to Themberchaud how the Keepers of the Flame meant to replace him with the newly hatched and easy to control Firestarter. Hearing this, Themberchaud went berserk and started burning the city down.
The Party was able to escape Gracklstugh while it went down in flames around them.