"Possession?" Syrlya's tone and expression immediately tell how that concept is as foreign to him as toxic magic is to Solas. Not that there weren't spirits and ghosts and Tyria, and possession wasn't possible, but it also wasn't something you heard about outside of books and fourth-hand accounts. Beings from the Mists, be they the dead or something else, just didn't do that.

"So spirits use mages as a way to get into Thedas? Is that... is there no way to prevent it? What draws them to try and leave the Fade in the first place?"

Corrupted or not, some other people trying to hi-jack someone's body sounds utterly alarming to begin with. Have they truly never found a way to handle it?