Snake
This NPC can be found in Zangarmarsh (209), Zul'Gurub (88), The Black Morass (68), Dustwallow Marsh (60), Wailing Caverns (40), Desolace (29), The Temple of Atal'Hakkar (27), Dire Maul (22), Eversong Woods (21), Feralas (18), Un'Goro Crater (18), Maraudon (17), Westfall (15), The Shattered Halls (9), Silverpine Forest (7), Ghostlands (7), Howling Fjord (7), Gundrak (6), The Barrens (6), Sethekk Halls (6), Hellfire Peninsula (5), Black Temple (4), Nagrand (4), Grizzly Hills (3), Silvermoon City (1), Terokkar Forest (1) and The Steamvault (1).