The area we are aiming for is the center of this fog covered region, where the poisonous fog is at its densest. That would show the degree of nature can adapt, if even in this environment life can exist. However our efforts will lead us underground to an unknown cave system, probably not even fully explored by well anybody excluding the creatures that probably rule this area. How would these passages actually look, naturally they would be created from rock but what else might lie within the earth, foreign crystals, various types of rocks, basically materials that the world before could not obtain through whatever means hindered them.
Within the cave system, in an open region would be a barrier chamber, glowing with a faint purple glow. Inside the chamber was a person, a male to be more exact, with his back against the wall giving the appearance that he was forced into the chamber somehow and the barrier was created to stop his fall. It didn't really seem like the barrier was running low on power, makes one wonder what technology would be like now if the war had never happened. Thinking about it, if the Zireh continued to improve the war would have happened sooner or later, even though that is slightly off topic. Back on topic would be how to get this person out, which is not by force rather by chance. Probably by a random occurrence that a rock broke off from above and landed on the exact spot it took to shut down the barrier.
With the shut down of the barrier the male would fall to the ground hitting his head on the ground with a thump. That fall would be the trigger to his awakening, as all his memories would return to him in an instant even though all of that was irrelevant at the moment. Why? Because he just hit his head against the ground after finally being freed from that damn barrier for he doesn't know how many years. Further more based on how he was thrown into it, he was pretty damn pissed about it, who wouldn't be? Throwing a person into a barrier against their will, what kind of savages do that, its just inhuman, yes humans didn't do it but that is besides the point. Regardless, he would grip the back of his head while his upper body swung upwards from the pain.