It's getting darker and darker, and the air is getting more and more polluted. The mist is getting stronger and stronger, and it's not just a matter of the air getting polluted. It has "mental corrosion effect" , which means that it can even kill you. It seems like there's a good chance that they'll have to go back to the core of the universe, where they can use their "soul power" . They can't go back, he says, because the mist is so thick that they won't be able to figure out where they're going. He's worried about losing Donnithorne, because she's such an important person in his life, and he doesn't want to lose her. He tells Tur that he can go back tomorrow morning if he wants, or he can wait outside in the sunset forest for three days if he hasn't come back yet.