The Warlock clan was a mentioned grouping of orcish warlocks dating back before the First War. In the writings of the infamous warlock Gul'dan, he mentions Warlock clans that are apparently at least partially separate from the Shadow Council. Orgrim Doomhammer slaughtered them, and Gul'dan replaced them with the death knights. Mentions of "Warlocks" throughout these sources may or may not refer to the clan(s).