According to Sage Larand within Recuso Tor in The Blinding, something's afoot (not the sooty kind) in Solusek's Eye: The Calling [Heroic], and he wants me to dig up whatever that something is. I do owe Nagafen a favor or three, so I might as well return one of them. And after spelunking through those scorching caverns, I'll want to return to Sage Larand for the favor he'll sure enough owe me for my efforts.