Snake
This NPC can be found in Zangarmarsh (209), Zul'Gurub (88), The Black Morass (68), Dustwallow Marsh (60), Wailing Caverns (40), Desolace (29), Maraudon (23), Dire Maul (23), Eversong Woods (20), Un'Goro Crater (18), Feralas (18), Westfall (15), Ghostlands (8), Silverpine Forest (7), Howling Fjord (7), Gundrak (6), The Barrens (6), Hellfire Peninsula (5), Nagrand (4), Black Temple (4), Grizzly Hills (3), Terokkar Forest (1), The Steamvault (1) and Silvermoon City (1).