He shifted to astral perception and studied the being’s aura. He knew now how to recognize a wendigo aura, and he had no doubt that he was seeing one. But he had not been magically active the last time he had seen his sister. Nor had she gone through the change. How would he know if this was she? He could not be sure. Like a half-remembered dream, something in the being’s aura nagged with familiarity.