DSA - Catalogus Heptasphaericum

The entities of the 7th sphere, the demons, are among the most feared creatures that a group of adventurers can encounter. Their versatile abilities and combat strength make them unpredictable opponents. The Catalogus Heptasphaericum entertainingly describes several dozen of the most well-known, as well as some lesser-known demons, outlining their strengths and weaknesses and explaining what must be done to summon them. The author of this in-game book is the black magician and demonologist Magister Demirion Ophenos from Mengbilla. He has written his book as a textbook for students and the curious who need an overview of the fundamental workings of demons and their summoning. Ophenos is aware that he does not know as much about some entities as he would like. Therefore, he has repeatedly included the insights of other experts in demonology and printed their correspondence in his work. In addition to the demons, Ophenos also describes potential countermeasures, such as banishing and protective circles, antimagic, and other ways to keep dangerous creatures at bay.