Thuldanin was the second layer of Acheron. It contained the divine realms of Laduguer and Deep Duerra, according to the Great Wheel cosmology model.[2][3][4]


This layer was the Sargasso Sea, Elephants' graveyard, and scrap heap for countless contraptions, creations, weapons, armor, failed experiments, broken devices, fallen buildings, and shipwrecks of sea and air. The blocks of Thuldanin were hollow and pockmarked with pits that lead deep into the interior. There the flotsam and jetsam of the ages turned to stone in a matter of days or weeks because of the magic of this layer.[citation needed]


Thuldanin had no inhabitants, except for the duergar living in Hammergrim. Other than this, there was only the occasional visitor from Avalas looking for some piece of magic or technology that might turn the tide of battle.[5][6]

Notable LocationsEdit

Divine RealmsEdit

Notable CubesEdit



  1. Jeff Grubb (April 1987). “Plane Speaking: Tuning in to the Outer Planes”. In Roger E. Moore ed. Dragon #120 (TSR, Inc.), p. 43.
  2. 2.0 2.1 2.2 Jeff Grubb, Bruce R. Cordell, David Noonan (September 2001). Manual of the Planes 3rd edition. (Wizards of the Coast), pp. 125–126. ISBN 0-7869-1850-8.
  3. Colin McComb (1996). On Hallowed Ground. Edited by Ray Vallese. (TSR, Inc), p. 172. ISBN 0-7869-0430-5.
  4. 4.0 4.1 Eric L. Boyd (1998). Demihuman Deities. (Wizards of the Coast), p. 54. ISBN 0-7869-1239-1.
  5. Jeff Grubb (July 1987). Manual of the Planes 1st edition. (TSR), p. 113. ISBN 0880383992.
  6. 6.0 6.1 Wolfgang Baur (February 1995). “Acheron”. In Michele Carter ed. Planes of Law (TSR, Inc), p. 21. ISBN 0786900938.
  7. Wolfgang Baur (February 1995). “Acheron”. In Michele Carter ed. Planes of Law (TSR, Inc), p. 22. ISBN 0786900938.


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