Valthrun the Prescient – Sage of Winterhaven has completed a most exhaustive research of Thunderholme and submitted this report to Thunefir. Curiously, it has less to do with Thunderholme in general than it does with the Dragon that now inhabits it.
Born in the Year of the Black Dawn, 426 DR, to Shhuusshuru, she prowled her mother’s domain in the Far Hills for nearly two centuries until establishing her first lair in the southwestern Thunder Peaks in 616 DR. Both elven rangers from Cormanthyr and dwarven scouts from Thunderholme noted her arrival but neither race chose to move against her. She stayed out of things for the following century and was eventually forgotten by all but the most devoted dragon hunters (none of whom ever actually got to engage with her).
In 989 DR, dwarven miners from Thunderholme accidentally expanded their works into her lair, rousing her from her sleep. She dispatched the dwarves and caved in their tunnel to make it appear as an accident. She became interested in Thunderholme’s operations and observed the dwarves via divination magic and spies summoned from the Plane of Shadow.
In 1501 DR she began whispering dark promises to the High priest of Dumathoin of the dwarven city Dagan. Over the next 33 years his ambition, madness and obsession with death increased and he named his voice the “Sibilant Shade”, a name which pleased Aurgloroasa greatly. He rose to a preeminent position in the city thanks to her whispers, second only to his king, Emerlin XIII. The old king died just after his only son and heir disappeared on a trade mission to Selgaunt in 1534 DR and Dagan became regent of Thunderholme in their stead (note: both the king and the prince’s fates were caused by the dragon’s agents). Dagan used his new power to build a huge temple to Dumathoin in the heart of the city which took 20 years to complete. The regent was holding a grand ceremony to open the temple even as the demonic horde was fighting a horrible war of attrition against the Bronze Warders and gaining Thunderholme and shocked the city’s population by dedicating it to Null instead of Dumathoin, summoning Aurgloroasa, believing her to be Null’s avatar. She proceeded to assail Thunderholme from within and to kill all but 30 of the dwarves and then hunted down and killed those over the next few weeks. It is rumored that all those that died now serve the dragon in undeath as skeletons.