Myriam Moonsinger

From WoWWiki

Myriam Moonsinger is a level 35 quest giver located on a hill just south of the huge pig skull-shaped entrance to Razorfen Downs in the Horde-aligned territory of the Barrens. She is friendly to both Alliance and Horde.

She starts the quest  [35] A Host of Evil (Dungeon).

See List of the Barrens NPCs.