Collect 10 pieces of Ethereal Technology and return them to Papa Wheeler at Area 52 in the Netherstorm.
Those ethereal clowns are as opportunistic as us, I'll give them that. But no one, and I mean NO ONE, moves in on a B.O.O.M. claim!
The Heap to the south is ours!
If we're to finish the X-52 Nether-Rocket, we're going to need all of the new tech that we can get our hands on. And since the ethereals are stealing from us, I think it's only fair that we repay them in kind.
Why don't you head down there and see if you can acquire some of their technology out from under their noses!