Aurgloroasa Aurgloroasa ( pronounced ore - " GLOR " - oh - " ASS " - ah ) , also known as Sibilant Shade , was a venerable shadow dragon responsible for the fall of the dwarven city of Thunderholme in the Thunder Peaks . Personality . Aurgloroasa was obsessed with research into death , undeath , necromancy , and shadow magic . She also considered herself to be the draconic death god Null ' s most faithful servant and her most ardent wish was to become his consort and thus a demipower in her own right . Towards this goal she aspired to bring a large portion of Faerûn under her sway and create a draconic theocracy in Null ' s name . History . Early Years . 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 ) . A Shadow in Thunderholme . 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 1001 DR she began whispering dark promises to the dwarven city ' s High priest of Dumathoin , 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 III . The old king died just after his only son and heir disappeared on a trade mission to Selgaunt in 1034 DR making Dagan 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 held a grand ceremony to open the temple in 1054 DR 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 kill all but 30 of the dwarves and then hunted down and killed those over the next few weeks . All those that died then came to serve the dragon in undeath as skeleton s . Deeds across the Lake of Dragons . After her impressive triumph regarding Thunderholme , Aurgloroasa still had more intrigue and activities to keep her busy . She took time to enjoy attacking ships , especially around the mouth of the Lake of Dragons , often in the guise of the more commonly sighted red dragon , Nevalarich . The " Ballad of the Shadow Storm " was penned in reference to one of her few forays in her true form , after a devastating scuttling outside Westgate in 1091 DR . Aurgloroasa considered seizing Westgate for her own , but only reconsidered this after the death of the blue dragon Anaglathos of Turmish in 1247 DR . Under her covert direction , she orchestrated a merchant war in Sembia by using the Night Knives to instigate a three - year civil war between 1254 DR and 1256 DR . In 1299 DR , Aurgloroasa battled with the enormous black dragon , Arngalor , while she was disguised as a blue dragon . Eventually the Sibilant Shade drew out Arngalor and slew him in the skies over Archendale , where this event became known as the " dragon war " . She then feigned injury and flew off to recover Arngalor ' s hoard before anyone else could . Cult of the Dragon . She was approached by the Sembia n sect of the Cult of the Dragon in 1305 DR after she had already decided to undergo the transformation to lichdom and left clues for the cult to follow ( although that didn ' t stop her from extorting a massive sum from the cult before she actually said that she agreed to the process ) . She then bribed , blackmailed and fooled enough cultists to weaken the magical bonds they would place on her when she was finally made into a dracolich in the Year of Lurking Death ( 1322 DR ) so that she would still be an active player in their plans . Plots of a Dracolich . Since her transformation , the Sibilant Shade kept quite active ( which is unusual for her ) , she stole the archmage Mhzentul ' s powerful works and his library of arcane lore in 1340 DR whilst sabotaging the Cult of the Dragon ' s infiltration of Featherdale . A few years before 1370 DR she enspelled a hapless adventurer called Orytar into persuading other adventurers to try and defeat her , providing him with a Dethek runestone to Thunderholme that he would give to others . The adventurers would come and she would take their equipment and sacrifice them to her god . Rage of Dragons . During the Rage of Dragons she used her status as a dracolich to avoid going mad and easily put herself in place to take over the Sembian cell of the Cult of the Dragon . Already a dominant influence on the cult , when the rage ended , she had effectively taken over the cell and with Sammaster dead , she established a ruling triumvirate of the entire cult with Daurgothoth and First Interpreter Algashon Nathaire which quickly began showing signs of strain .