Hmm. Dust couldn't kill the last spirit he'd fought -- it was a ghost with a more complicated means of dealing with it, and one of the few things that had ever terrified him. This thing seemed a lot simpler, if only because it was in the circle.

Hmmmmm.

"We can creep around it," Dust said, pointing to the side. A circle in a square room that gave them enough room to stand? There was at least a little space to either side.