Go back to the Monitor Station in Magmoor to reach the Phendrana elevator, but on the way in the Fiery Shores room you'll be able to find Missile MC.03. For now head back to the Magmoor Caverns by way of the Tallon Canyon (the same way you came through earlier). With your first artifact in hand and the Space Jump Boots, we can now return to Phendrana for more ice expeditions. Don't forget to take in the sights at the temple.
