Marvon Rivetseeker is a level 40 quest giver located at the Broken Pillar in the contested territory of Tanaris. He studies the ancient areas of the world, and his workshop is located in the goblin town of Ratchet. He recently set off on an expedition in Tanaris, and was last seen heading south from Gadgetzan.
He starts the following quests:
See List of Tanaris NPCs.