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Araumycos (Dwarvish[1] for “Great Fungus”) was an enormous fungal growth that lived in the Upper Northdark and lay beneath the High Forest between the cities of Menzoberranzan and Ched Nasad.[2]


Araumycos a huge life form, a single organism that covered almost all the parts of the Underdark beneath the High Forest, beginning at a depth of one mile (1.6 km.) under the surface and ending at a depth of three miles (4.8 km.). It was believed to extend from the Shining Falls to the Lost Peaks and from Tall Trees to the Hall of Four Ghosts, wholly occupying the labyrinth of tunnels and caverns that existed beneath the High Forest.[3] But it seemed that it had reached its peak of volume since it no longer grew through other territories.[4]


Centuries ago the area where Araumycos was located was mined and occupied by the dwarves of Ammarindar during the time of the elven realm Eaerlann.[3],[5]

The dwarves of ancient Ammarindar spoke of their mines located in the region beneath the elven realm of Eaerlann that were abandoned to the slow, inexorable growth of Araumycos. The elves have legends that date back farther still, linking the birth of Araumycos to the fell sorceries of the Vyshaantar Empire, but so little was known of that era, even among the long memories of the elves, that no origin could be conclusively determined. Araumycos was thought by some to be the oldest living creature on Toril; even the gods did not speak of it, and divine divinations regarding the titanic fungus always failed.[5] Some believed that the creature was an avatar of Psilofyr, the lord of the Myconids, but this was only a theory.[6]

Since the Spellplague, the rumored awareness of Araumycos was proven. Referring to itself as “King Araumycos,” it brought millions of myconids under its domination, and tried to do the same with any sentient creature within hundreds of miles through strange nightmare-dreams (which the drow called golhyrrl' fhaazht or “the Dream Trap”) that spoke of the comfort of the mass and the hopeless chaos of individuality.[7]


Araumycos was immune to magic and greatly resistant to psionic energy.[5] Some areas of Araumycos could be attacked with normal weapons or were vulnerable to fire, acid, and other means, but destroyed parts grew back within a short time.[8] Prior to the Spellplague it seemed that the fungus was unaware of intruders and their destructive ways, but there were rumors telling otherwise. Araumycos had terrible defenses such as poisonous gas, enormous psionic power, and it could manifest slimy creatures similar to oozes. Araumycos could also use spores to dominate the will of victims and emit substances which could animate skeletal remains upon which they cling.[4]

From time to time, without explanation, large sections of Araumycos withered and decayed, revealing ancient, undisturbed caverns. These caverns sometimes contained ancient ruins and were greatly sought after (especially by Shade Enclave). They were eventually reclaimed, either in hours or centuries.[3],[5]


Although Araumycos for the most part completely filled the tunnels it inhabited, a few area were not entirely covered.

Blacktooth Rock 

Blacktooth Rock was an intersection of tunnels in ruined Ammarindar named for a large black stalactite that looked like a fang biting into fungus. The intersection was a layered chamber carved by the dwarves. It was passable but full of Araumycos.[9]




  1. Thomas M. Reid (December 2003). Insurrection. (Wizards of the Coast), p. 34. ISBN 0-7869-3033-0.
  2. Thomas M. Reid (December 2003). Insurrection. (Wizards of the Coast), p. 25. ISBN 0-7869-3033-0.
  3. 3.0 3.1 3.2 Eric L. Boyd (1999). Drizzt Do'Urden's Guide to the Underdark. (TSR, Inc), p. 54. ISBN 0-7869-1509-9.
  4. 4.0 4.1 Ed Greenwood and Jason Carl (July 2002). Silver Marches. (Wizards of the Coast), p. 35. ISBN 0-7869-2835-2.
  5. 5.0 5.1 5.2 5.3 Bruce R. Cordell, Gwendolyn F.M. Kestrel, Jeff Quick (October 2003). Underdark. (Wizards of the Coast), p. 126–7. ISBN 0-7869-3053-5.
  6. Bernstein, Eytan. “Psionic Races and Classes: Ghostwise Halflings, Githyanki, Mind Flayers, Yuan-ti, and Psionic Bestiary.” 27 Jun. 2007. Wizards of the Coast. Accessed: 2 Jun. 2011 <> (WebCite Archive)
  7. Bruce R. Cordell, Ed Greenwood, Chris Sims (August 2008). Forgotten Realms Campaign Guide. (Wizards of the Coast), p. 232. ISBN 978-0-7869-4924-3.
  8. Thomas M. Reid (December 2003). Insurrection. (Wizards of the Coast), p. 32. ISBN 0-7869-3033-0.
  9. Thomas M. Reid (December 2003). Insurrection. (Wizards of the Coast), pp. 33–34,58. ISBN 0-7869-3033-0.

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