Drider

This article or section is about Monstergirls (or a monster that is frequently depicted as a Monstergirl), something that /tg/ widely considers to be the purest form of awesome. Expect PROMOTIONS! and /d/elight in equal measure, often with drawfaggotry or writefaggotry to match.

Fun fact: originally, driders were supposed to turn pale white as part of the transformation.

Driders are a creature that originated in the Forgotten Realms of Dungeons & Dragons. They are basically centaurs, but replace "human half" with "drow elf half" and "horse body" with "giant spider body". Basically, the batshit crazy Lolth has a history of transforming her followers into half-spider monsters for shits 'n' giggles.

In the original lore, transformation into a Drider was supposed to be a punishment for those drow who failed one of Lolth's various psycho-tests or for a male who pissed off a high priestess so bad murderraping him to death wasn't punishment enough. It doesn't make a hell of a lot of sense considering that Lolth herself is basically half-drow and half-spider in her favorite avatar-form, that she considers spiders sacred (her original title was Demon Queen of Spiders for chrissakes) and Driders are actually more powerful in crunch than the drow they were made from. So when 4th edition came around, the fluff got changed to match the crunch ang getting Drider'ed became a cherished reward for her most worthy followers instead. 5th edition went back to the old fluff, arguing that Lolth is batshit insane and that few if any of her actions makes sense at all.

Pathfinder made driders into the results of twisted mutative "fleshcrafting" done on failures with no divine connection at all. It also introduced a classic monstergirl sexual dimorphism; female driders look like sexy half-drow half-black widows, whilst male drow are hideous spider-faced half-tarantula brutes.

In Eberron, Drow instead worship the scorpion god Vulkoor, and thus have drow/scorpion hybrids called Scorrow.

Since the basic picture of a Drider is inevitably a sexy black-skinned elf-lady atop a giant spider, centaur-style, it should be no surprise that they have taken off as one of the more common forms of monstergirls. Non-explicitly D&D based ones tend to be called Arachnes, however, since, y'know, trademarks and Arachne being the woman who became the first spider in Greco-Roman myth and all.

It's surprisingly common for monstergirl Driders to parasitically lay eggs inside of human hosts with an ovipositor, especially nubile human or elfin maidens. Precisely why, nobody freaking knows, especially since first, Driders were always depicted as sterile in D&D (Lolth might be crazy but she doesn't want to create a self-sustaining rival race to her beloved/hated Drow) and second, spiders just don't do that sort of shit in real life. Like, at all. Only some species of wasps do that, the eggs are usually injected like a syringe rather than deposited with a tube and as an ironically fun fact, spiders are known for being at the receiving end of it.