Araugauthos

Araugauthos, called the Bluetalon, was an old blue dragon that was imprisoned in the ruins of Undermountain by Halaster Blackcloak. She later escaped from imprisonment.

History
In autumn in the, Citadel Amnur in Amn was attacked by an unknown red wyrm. Soon after, Araugauthos attacked the red wyrm by ripping through its wings with her claws, causing it to fall to its death, becoming impaled on sharp rocks. Araugauthos questioned the troops at Citadel Amnur for news of Faerûn since her imprisonment and left after two tendays, taking most of the contents from the lair of the red wyrm. She traveled to the lair of her mother, Iryklathagra, where she aided in the defense of the lair and acted as a decoy to would-be dragonslayers. Her mother rewarded her well for the service and the two got along very well.

Iryklathagra surmised that the reason for Halaster's imprisonment of her daughter dated back to when she herself was a wyrmling and looted an abandoned tower that belonged to the Mad Mage.