oh, Don't worry, I won't destroy the world. That was just to scare everyone. The Dweller is basically just a big worm without a brain. Dominus is it's brain. And so long as he cannot contact it, the world's cities are safe. It is happily feeding off of camels in the desert. Lots of camels. In fact, if camels go extinct in that region, it will be because of the Dweller. Environmentalists be damned.