Roach
This NPC can be found in Dire Maul (32), Razorfen Downs (26), Desolace (21), Mana-Tombs (17), Western Plaguelands (16), Ahn'Qiraj (15), Ahn'kahet: The Old Kingdom (15), Ruins of Ahn'Qiraj (13), Grizzly Hills (8), Icecrown Citadel (10), Stonetalon Mountains (5), Azjol-Nerub (12) and Maraudon (1).