Slay Netherock and then report in with Rocket-Chief Fuselage at Area 52 in the Netherstorm.
To whomever cares about the timely construction of the X-52 Nether-Rocket --
The king of the local mountain giants, Netherock, has been terrorizing the Crumbling Wastes. He's been interfering with operations all along the south ledge of the island!
Take your friends and deal with him! Then, return to me here in Area 52.