Skeletal Dragons

Skeleton Dragons are Dragons that became so powerful, that they have chosen to live on even after their death (much in the way Liches do). They wield strong magic and attack anyone daring to come close to their lair. But since they are only made of bones, strong blunt weapons like hammers can smash them to pieces -- only, of course, if the warrior manages to come near enough in the first place....

Only two Skeleton Dragons are found in Ultima, both in dungeons on Serpent Isle in Ultima VII Part Two.

Trivia

 * Lorthondo raised a Skeleton Dragon.