Umbraxakar

Umbraxakar was a shadow dragon companion of Vanrak Moonstar in Vanrakdoom, part of the vast Undermountain complex beneath Waterdeep.

History
Once Umbraxakar was a noble bronze dragon named Glyster allied with House Moonstar. When Vanrak and his followers escaped into Undermountain to escape punishment was asked to Glyster to find and capture the renegade noble. However Glyster was somehow corrupted by Shar's powers and turned in a shadow dragon that served as companion, guide, and mount of Vanrak.

For a century Umbraxakar spent more than a century lamenting the fall of Vanrak Moonstar.

Around  1492 DR  Lady  Wylynd Moonstar, matriarch of the Moonstar noble family, asked to a very competent adventuring party to find and somehow redeem Umbraxakar. Meantime because of the despair for the death of Vanrak Umbraxakar experienced strange visions that slided in and out of the Shadowfell at irregular intervals some areas of Vanrakdoom.

Personality
Glyster was corrupted when he sank in despair for his failed tentatives to redeem Vanrak. After Vanrak truly redeemed himself and died Umbraxakar went back to despair. Without despair Umbraxakar went to his Glyster persona.

Relationship
Glyster had a deep friendship with Vanrak and when the noble ranger turned to evil and to Shar the dragon tried all to save his friend; instead was Glyster that was corrupted but he still valued only the friendship with Vanrak.

Powers
Umbraxakar somehow gained the power to slided some areas of Vanrakdoom to the Shadowfell until he was alive.