"The War of the Shadow began as a conflict of men against men. But Lews Therin and his supporters soon discovered that the Dark One was more than willing to use inhuman soldiers to fight his battles. Early in the war those opposing the Shadow found themselves suddenly facing not just men, but hordes of dark horrific creatures out of nightmare, and their numbers increased as the war continued. These Shadowspawn were often vaguely human, but with differences born of the dark that made them far less than men, if more deadly.
Many of these creatures were created by the Forsaken Aginor, and others from existing genetic material. They were designed to breed true whenever possible, since natural procreation was a more certain and less costly way to produce large populations than were laboratory vats."
Let the Dragon ride again on the winds of time.