"There's nothing to eat there right now, just a monoculture of grass. I would become nonfunctional in fairly short order unless I was allowed to collect and cultivate fey food or you decided to have a mortal feed me mortal food. The Steppes are also only slightly farther from Thorn's usual operating area than the place I most recently tried to live was, although a population of mortals with whom I had a reasonably free hand could protect me if they were smart enough to pick up sorcery, or had local magic to use, and luck and timing cooperated."