Loyal Magmammoth

Complete daily and weekly quests at the Obsidian Citadel to reach maximum reputation with both Wrathion and Sabellian. Reaching max reputation with each will unlock the achievements The Obsidian Bloodline and Loyalty to the Prince, which are required to proceed.

Purchase the Netherforged Lavaproof Boots for 800 Gold from either Samia Inkling at 24.72, 56.78 (upper level) or Xaldrass at 27.73, 56.24 (lower level) in the Obsidian Citadel. These vendors are only accessible after reaching max reputation with Sabellian.

Purchase the Sturdy Obsidian Glasses for 800 Gold from either Lorena Belle at 25.2, 55.8 or Atticus Belle at 26.53, 62.45 (lower level) in the Obsidian Citadel. These vendors are only accessible after reaching max reputation with Wrathion.

Bring both items to Yries Lightfingers at 26.37, 55.45 on the upper floors of the Obsidian Citadel and trade them for the Magmammoth Harness.

Head to the Burning Ascent area at 66.3, 24.4 in The Waking Shores and locate a friendly Tame Magmammoth — do not approach the large hostile one roaming nearby. Before mounting, look for a Qalashi Necksnapper NPC near the mammoth; aggroing it will trigger the dialog 'This one's mine!' and you must kill it first. After defeating the Necksnapper, right-click the Tame Magmammoth to ride it, then use the Magmammoth Harness while mounted to receive the Loyal Magmammoth mount.