D&D Monsters: Beholders

The beholder is, perhaps, the single most iconic monster in D&D - the one creature that, more than any other, says "this is D&D" rather than some other fantasy setting. That's largely due to its unique appearance, which is quite unlike anything that exists in myth or legend or, indeed, in prior fiction. It was created, not by Gygax, but by one of the players in his original campaign, first appearing in a supplement for 0E, and has successfully stood the test of time ever since.

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1E

As originally shown, the beholder is a spherical creature covered in irregular, flat, "chitinous" plates. A wide mouth occupies much of the lower half and is lined with small pointed teeth similar to those of reptiles. There is a single large lidless eye above the mouth and ten much smaller eyestalks arranged in a ring around the upper surface. The latter are protected by segmented chitin and have also have lidless eyes, similar to those of a snail or slug, although the eyestalks presumably aren't retractable. Severing the eyestalks doesn't otherwise hurt the creature, which suggests that it's able to shut off the blood supply to a severed stalk - or perhaps that it doesn't have blood. There are no other visible features, such as nostrils.

D&D Monsters: Otyughs

There has been some speculation that the otyugh is based on the tentacled monster in the trash compactor in the first Star Wars film (referred to in the tie-in material as a "dianoga"). Certainly, there is a resemblance, especially given that we don't see the whole creature in the film; based on that alone, the rest of the body could look like almost anything. On the other hand, the film only came out a few months before the otyugh made its debut so it would have to have been a very last-minute addition to the 1E Monster Manual if that really was the source. More likely, it's a coincidence, leaving the D&D monster as an original creation.

D&D Monsters: Mind Flayers

The mind flayer is a creature original to D&D and, like many of Gygax's early creations has a "does what it says on the tin" style name. To my mind, it's one of the better such names - although almost anything is better than, say, "lurker above". The look of the creature is obviously reminiscent of H.P. Lovecraft's Cthulhu, and Gygax stated that it was inspired by the cover of a book by Brian Lumley that does, indeed, feature a being from the Mythos. But, as it happens, it isn't the Big C himself that's on the cover, but a chthonian, a creature with a similar name, to be sure, but actually rather different. Still, it has tentacles and this, seemingly, was enough.

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1E

The mind flayer goes through relatively little change in physical appearance through the various editions of the game, to the extent that the few changes that are apparent could easily be put down to variations between individuals of the same species. Even the clothing doesn't change much, with the race clearly having a preference for robes and insisting on a skull motif somewhere on their belt.