Warlock Trainer
This NPC can be found in Tirisfal Glades (2), Silvermoon City (2), Durotar (2), Dun Morogh (2), Elwynn Forest (2), Azuremyst Isle (2), Teldrassil (2), Undercity (1), Eversong Woods (1), Thunder Bluff (1), Mulgore (1), Orgrimmar (1), Ironforge (1), Stormwind City (1) and The Exodar (1).