Lorthondo

Lorthondo is the name of the mad mage who ‘controls’ the dungeon known as the Mountains of Freedom on the Serpent Isle. He appears in Ultima VII Part Two.

Description
Lorthondo was driven mad by exposure to stoneheart, a reagent precursor found only on the Serpent Isle, which is known to drive mages mad with prolonged exposure. He entered the Mountains of Freedom originally to mine for stoneheart, for the purpose of converting it to blood spawn. He succeeded in this enterprise, and remained within the dungeons voluntarily to defend his mining operation. He lived within the dungeon in relative opulence, and had build a throne. Before he died, Lorthondo made it clear that he knew the way out of the dungeon, and prevented others from leaving.

Lorthondo’s skills included but were not limited to using the death of one of his human minions to raise a skeletal dragon. He met his death at the hands of Arcadion -- whom the Avatar had freed and directed to kill him.

Trivia

 * Whether he was paid by the MageLord to keep prisoners within the dungeon is not known.
 * Lorthondo acted in a way that most would probably consider "evil." Whether this behavior was due only to stoneheart exposure, or whether he was naturally of an evil temperament, is also not known.