Return to the Citadel

Teleport to the Sogot Citadel and ask Tegorah for advice.

You'd better leave the demonologists alone. Demons trust you, ask them for advice. You may talk to Tegorah directly, I guess.
Give my regards to the big guy. He's a decent fellow, even though he's a demon.

Tegorah nods slowly.
"Welcome back, Stormbringer."

...Tegorah falls silent for a while. Obviously, it isn't the best day for a friendly visit. Skulnar's regards can wait.