Tower - Room 87

You enter a desolate hallway. A tethered lantern sways to and fro by some unknown momentum. A scroll stuck to the wall piques your interest. It reads:

Attention: Toasty is missing. Check the mess hall and specimen laboratory. Cast protection from fire before handling. ~Archivist

You remember the shrouded scribe who requires writ from the archivist to gain entry to Salin's domain. Perhaps finding "Toasty" will help. But which door to take?