The Ogre-Magi were originally a small band of extremely loyal Ogre enforcers, transformed by Gul'dan into scheming and malicious sorcerers. By warping and twisting the Elf-magicks of the Runstone at Caer Darrow, Gul'dan was able to infuse the magical abilities of long dead Warlocks into the bodies of these unsuspecting hosts. Once hulking simpletons, the transformed Ogre-Magi can direct their dead magicks as easily as their lesser cousins would deliver a crushing blow to any foolish enough to stand in their path. The Ogre-Magi have also become extremely cunning and insidious - serving the Horde only as they see fit.