Grand Theft Mammoth

Grand Theft Mammoth is a collections achievement earned for liberating a Qalashi magmammoth with the Magmammoth Harness.

To acquire this mount, first reach True Friend standing with Sabellian and Wrathion at the Obsidian Citadel, then purchase the Netherforged Lavaproof Boots and Sturdy Obsidian Glasses for each. Take those items to Yries Lightfingers at atop the Obsidian Throne and trade them for the Magmammoth Harness.

Use the harness on the Tame Magmammoth at on the Burning Ascent. It may be necessary to in order to mount the mammoth.