Snake
This NPC can be found in Dire Maul (23), Silverpine Forest (6), The Steamvault (1), Black Temple (4), Hellfire Peninsula (12), Nagrand (10), Terokkar Forest (1), Zangarmarsh (189), Blade's Edge Mountains (7), Eversong Woods (21), Desolace (19), The Barrens (24), Stonetalon Mountains (3), Wailing Caverns (40), Maraudon (23), Un'Goro Crater (15), Tanaris (2), Silithus (1), Dustwallow Marsh (47), Thousand Needles (2), The Black Morass (68), Zul'Gurub (88), Ghostlands (7), Westfall (15), Tirisfal Glades (1), Feralas (18), Silvermoon City (1) and Sunken Temple (27).