Under Construction! Some (or all) of the information on this page was started by a (well meaning) fanatical cultist, but was never completed, and appears to have been abandoned. Please help complete it if you are able! See this YSDC Forum discussion for details on how you can help: (link) Problem logged on: Feb 19, 2017 The specific problem is: REASON (More details may be found on the Discussion Page.)
The Adumbrali are from Robert A.W. Lowndes' The Abyss.