Imvaernarhro, Inferno of the Star Mounts

Imvaernarho, or Inferno, was an ancient red dragon who has mastered fire magic and whose lair rested in the Star Mounts. Legends surrounding the great wyrm have been spread all throughout the Western Heartlands and the Sword Coast North. Although he has typically kept himself isolated from other, Inferno had taken a recent interest in the Silver Marches before his death.

Hoard
Maintaining several hoards of treasure located in various caves throughout the peaks of the Star Mounts, Inferno's wealth, in terms of gold coins, has been measured by Elminster to be at least "a dozen million".

Death
After many scout had either run away or perished when he sent them to the Silver Marches, he decided to look himself. Revealing himself for the first time since he destroyed Ellywick and Naeric's respective villages decades prior.

This got the attention of several dragons, giants, and his past victims. His slaves began escaping and the new alliance between many giants, several dragons, an army of people, and the Currens Fatum guild to move in, capturing his lair and laying in wait to ambush him. After hours of slaughter, Inferno was defeated by a sacrifice that allowed the remaining forces to finally slay the Inferno of the Star Mounts.

Legacy
Inferno had many half-dragons with his slaves, most of which still live in Nackles' Fall, his hoard went on to fund the vast majority of Nackles' Fall's construction and upkeep. His magical research went to expand the knowledge of the Neverwinter Mage's College and help advance the warding spells of cities across the Sword Coast and surrounding areas.