Right. You wanted to visit your world, which was clearly an illusion, and you knew the nightmare would come after you. And at the time, only you.

[He turns the corners into an alley. His attention switches to searching the wall for a second before he finds an array written close to the ground. Once it's activated, the wall melts away into another alleyway. The coloring of the surrounding rooftops looks to be Thor's, and ??? walks through without waiting for Draco to follow.]

My guess is that you wanted the nightmare to find you. How you talked about it, I'm pretty sure. It would be inevitable in that place, so why stay?