Spider
This NPC can be found in Karazhan (29), Shadow Labyrinth (27), Ghostlands (19), Naxxramas (36), Mana-Tombs (16), Ahn'kahet: The Old Kingdom (16), Auchenai Crypts (14), Zul'Aman (13), Pit of Saron (12), Utgarde Pinnacle (12), Grizzly Hills (11), Black Temple (10), Drak'Tharon Keep (13), Utgarde Keep (9), Zul'Gurub (6), The Forge of Souls (5), Azjol-Nerub (8), Violet Hold (4), Icecrown Citadel (22), Howling Fjord (4) and Halls of Reflection (3).