The ruins of Citadel Darvhage lie on the northern coast of Lake Sorrow in central Cheliax, and were once the home of the Hellknight Order of the Vice. The citadel (along with the entire order) was destroyed some time ago by unknown assailants. Travelers give the ruins a wide berth, but those that pass close to them report flashes of green light coming from the ruins during the night. Reports have also come of mutated animals, such as bears with lion heads and vestigial wings, roaming around the ruins of Citadel Darvhage.
- Rob Lazzaretti. (2011). Inner Sea Poster Map Folio, p. 1. Paizo Publishing, LLC.
- F. Wesley Schneider. (2009). Path of the Hellknight. The Infernal Syndrome, p. 71. Paizo Publishing, LLC. ISBN 978-1-60125-198-5
- Amanda Hamon Kunz, Ron Lundeen, and Mark Moreland. (2015). Cheliax, The Infernal Empire, p. 14. Paizo Inc. ISBN 978-1-60125-799-4