Skeletons are the most common creature to coalesce in the mists over the dark sea from the dreams of the dead. The dead often dream of themselves it seems. These skeletons are almost always violent, angry and mindless. There are stories, however, of skeletons capable of thought and speech and with memories of their past life.
Sorcerers are capable of learning a certain unholy and ancient runic language. By carving a particular rune on the inside of a skeleton's breastbone and carving a complimentary rune into his own flesh a sorcerer may bind the skeleton to his command. Wizards, rulers of aberrant empires of long ago bound countless skeletal warriors in this way and fought wars amongst each other. In the Southern Wastes there are tombs full of these silent armies and magical scrolls made from the skin of sorcerers preserve the runes of command.