Board Thread:TV Show Discussion/@comment-4708902-20161129230121/@comment-29740399-20161206170732

She also took Dark Sister. They showed it very clearly laying up against a tree. It makes perfect sense anyway since the Three-eyed Crow is Brynden Rivers aka Bloodraven, a legitimized bastard of Aegon IV Targaryen. But I think you're right, she did use dragonglass in the cave. I'll have to watch the episode again.