| Category | Races |
| Type | aberration |
| Creation | 1 Temporal 1501 DE |
| Language | Elvish |
| Native | Bal-Kriav |
In the Creation War (1486 DE - 8777 DE), the primordial assault on the Šadullu landmass commenced with a ripple of entropy that radiated outward for thousands of miles. A remote area at the time, a Covenant garrison on Toomoneth was the sole entity affected by this warping energy. On 1501 DE, this energy transformed a contingent of wood elves serving under Corellon. They became aberrant, insectoid beings. The Covenant made efforts to reverse the effects, but with the primordials attacking Straiden, resources were needed elsewhere. A period of insect-level cognition followed, with predatory insects coming to dominate Toomoneth Isle.
In 1805 DE, their humanoid thinking returned to them. This was prompted by a famine caused by over-hunting. They contemplated the churning waters and how to cross, with some using their web balloons, while the rest, recalling their former selves, set to work constructing boats and planning how to save their race from resource mismanagement. The survivors of this became known as the Arachnoids. They dispersed across Oralûth and to the jungles of Karterus and Straiden.