Kaorti

The kaorti were a "species" of warped humanoids from the Far Realm that sought to turn the Prime Material plane into a place more to their liking.

Description
Kaorti on the Material plane wore form-fitting armor of thick resin and tissue to protect themselves outside of their cysts. Without the armor, kaorti roughly resembled an emaciated human with brownish green skin marked with livid red, pink, and purple swirls; the whole of the skin seemed almost transparent and liquid. The arms and legs were elongated, with three fingers and thumb on each hand, though the digits were little more than boneless tendrils. The palms of each hand constantly secreted a thick green resin.

The bulbous head of a kaorti was attached to the body by a long neck, and the face looked like that of a melted spider. Kaorti stood about tall and weighed about  on average.

History
During the Dawn Ages, elves created the Vast Gate in an attempt to make travel anywhere instantaneous and to see what lay beyond the works of the gods. In doing so, the Vast Gate created a tiny opening into the Far Realm that allowed for an invasion from that plane's inhabitants. The Vast Gate was sealed forever, but the opening into the Material Plane from the Far Realm remained and slowly grew.

A group of Imaskari wizards who called themselves the Quin (the Roushoum word for 'entitled'), discovered ancient tablets detailing the elves' quest for reality beyond reality. Working from what little magical lore remained on these tablets, the Quin created the Quinspire in a much-publicized attempt to bring new magic from the other reality back to Imaskar.

The Quin succeeded but within minutes of their arrival, they had attracted the attention of a vast elder evil known to the aboleths as Zurguth. Zurguth's mere proximity to the unfortunate men transformed the Quin into the first kaortis. Imaskar soon forgot the Quin and little, if any, of their research survived. Part of the kaorti's alien minds recalled something of their previous existence however. This vague memory eventually spurred them to investigate faint traces of Material Plane residue left by the Quinspire, which they traced back to its source with their magic. When they rediscovered the Prime Material, they found it inimical to their existence and were struck by an all-consuming urge to transform it into a place more hospitable to them.