The Big Bad of Stranger Things 2 is a huge tentacled shadow monster which is eventually given a name by Dustin in episode 8: The Mind Flayer. Dustin says that’s the best analogy from the D&D world to make sense of what is going on in Hawkins. Everything from the Upside Down — the demo-dogs, the creeping vines, the underground tunnels burrowing into Hawkins, and the gate itself — seems to be under the control of a hive mind, and mind flayers are ruled by a hive mind (called an “elder brain”). They use their psionic abilities to dominate victims, which is what’s happening to Will. But there is a far better D&D comparison to the shadow monster: the aboleth.
The aboleth are huge floating tentacled monsters (see left) that are also ruled by a hive mind. Like mind flayers they have strong psionic abilities and use their mind control to make slaves. They excrete a mucus-substance which they need to breathe — the gooey substance from the Upside Down calls this to mind. The aboleth are an ancient life form and extremely intelligent, and they view all other races as inferior upstarts who stole what is rightfully theirs. In addition to being part of a hive mind, they are born with a racial memory, each one inheriting the memories of its ancestors. (An aboleth also assimilates the memories of consumed victims.) Aboleths enjoy spending time lost in the grand memories of their ancestors, and (time permitting) enjoy reliving entire portions of their ancestors’ lives. They are hermaphrodites and reproduce by egg. In season 1 of Stranger Things the Demogorgon reproduced by tentacle implantation (down Will’s throat), not egg, so the eggs we saw in season 1 were probably eggs for shadow monsters (aboleth) rather than more demogorgons.
An aboleth fits the description of the shadow monster almost to a tee, and it’s hard to see why Dustin associated it with a mind flayer instead. Mind Flayers have similar traits, as I mentioned, but their differences stand out. Significant is their positive view of magic. Mind flayers can be powerful mages. The aboleth despise all forms of magic and rejected it long ago in favor of science, which aligns with the sci-fic premise of Stranger Things. The mind flayers are humanoid in appearance (see right). Aside from their octopus-like heads, they bear little resemblance to the shadow monster of Stranger Things. The aboleth are gigantic (anywhere from 20-40 feet long) like the TV creature; mind flayers are the size of people. There’s no contest.
Dustin reads the information on the mind flayer in the D&D Monster Manual (1977), but there is actually no mention of a hive mind in this manual. The hive mind (elder brain) feature of the mind flayers would not be introduced into the game until 1998. So that’s a 14-year anachronism in the TV show. The aboleth first appeared in an adventure module called Dwellers of the Forbidden City (1981) and then were officially categorized in the Monster Manual II (1983), both of which predate the 1984 setting of Stranger Things 2. So they’re not an anachronism; Dustin would know about the aboleth, unless these kids never got around to buying the second Monster Manual, which I rather doubt. If they’re obsessed as I was with the game, which they clearly are, they would have obtained that manual in ’83 when it was hot off the press.
Late in the ’80s, Dragon Magazine #131 did a special feature on the aboleth, describing them as follows:
“In general, all aboleth are cruel, emotionless, and logical. All are extremely intelligent — some even more so than the most ancient of elven mages. They are believed to live for thousands of years, but exact information is difficult to gain. Over their many years of existence, the aboleth have developed a society which far exceeds that of humans in efficiency. In this society, each aboleth has a specific duty which it performs with the utmost skill. There are four major roles in the aboleth society. In increasing order of importance, these roles are: slave gathering, slave maintenance, scientific research and experimentation, and ruling. An aboleth feeds mainly on microscopic organisms which abound in its natural habitat, but it can also consume larger prey if necessary. Aboleth can survive in both air and water, but prefer water for obvious reasons. It is worthy to note that rumors exist of a grand aboleth, a creature so immense that it dwarfs even the rulers. If so, then perhaps it is better that surface and subterranean dwellers alike leave the aboleth to do as they please.”
Perhaps the shadow monster that possessed Will — and remains at large at the end of season 2 — is a grand aboleth. Not a creature I would mess with under any circumstances, unless I was ultra-high level and had an army at my back. Eleven crossed it badly by shutting the gate. I suspect she will reap devastating consequences in season 3.