Spider
This NPC can be found in Shadow Labyrinth (27), Auchenai Crypts (20), Mana-Tombs (16), Naxxramas (16), Ahn'kahet: The Old Kingdom (16), Ghostlands (15), Zul'Aman (13), Pit of Saron (12), Grizzly Hills (11), Utgarde Pinnacle (9), Drak'Tharon Keep (7), The Culling of Stratholme (7), Utgarde Keep (7), Black Temple (7), Sethekk Halls (6), Zul'Gurub (6), Icecrown Citadel (5), The Forge of Souls (5), Azjol-Nerub (5), The Violet Hold (4), Howling Fjord (4), Eversong Woods (4), Karazhan (3) and Halls of Reflection (3).