Kraw, from Ultima V: Lazarus
When talking with him, the Avatar didn't get much useful information. Kraw boasted that they were the finest stable in Britannia, but despite his efforts, he still hadn't managed to get any Valorian Warhorses for their stable.
Ultima V: Lazarus
In charge of Blackthorn's stables in Ultima V: Lazarus, Kraw bragged that all the finest horse breeds of Britannia were represented in his stables except for Valorian warhorses, which for some reason all withered and died when brought to the palace. They arrived on the island virile enough, but the island's ash and black stone sucked at their life. The only horse that had survived was Blackthorn's personal steed, Virtue, which had once ridden with the liege during his days with the Black Company. 
When Virtue was originally brought to the island, the horse had withered like the others despite Kraw and Blackthorn's best attempts to save him. As the horse lay dying, Blackthorn had sent all the other stablehands out of the room, but Kraw had stayed by the door listening. He heard Blackthorn's anguish as his friend died, but also heard a horrid sound like that of a thousand ghostly steeds, as his liege attempted to Resurrect the once noble horse. As Kraw ran into the stables to see the horse newly brought back to life, he was aghast to see that Virtue had been transformed into a creature of flame and claw. The newly arisen Shadowsteed burst from the stables and ran out into the wilds of the island. Kraw still sometimes caught sight of Shadowsteed's flames in the distance, and feared the demon horse's return.
Asked about Blackthorn, Kraw felt his liege was a good and noble man, but a man of many personal tragedies. He had once ridden with the Black Company, tending their horses. Kraw felt the entire island and palace were somehow evil, for it arose from the depths of the ocean that once housed the Skull of Mondain. Even the walls of the castle seemed alive and pulsed with the fire of the island, suggesting the hero speak with Kurtz, who had known one of the architects of the castle.