| Category | primordials |
| Type | colossal centipede aberration |
| Gender | male |
| Alignment | chaotic neutral |
| Born | unknown |
| Died | 14 Kindle 8542 DE |
Onaidred was a serpentine abomination adorned with countless quills and bony protrusions spanning its entire form. This creature was dreaded for its capacity to freeze the surrounding area. This effect was so frigid that it even compromised the integrity of enchanted stone and metal. It could burrow through the earth, first by freezing the locale, then rotating its body like a drill to shatter the stone, grinding it down to granules.
Under the terms of the Covenant, Set and his team were tasked with halting Onaidred's ruinous rampage across the land. East of the city of Ragil, Set and a group of celestial beings caught up with him. At the cost of seventeen angelic lives, they vanquished the monstrous entity.
When Onaidred perished, his flesh and organs decayed, leaving behind a skeletal structure of bone-white ice that remains unyielding as adamantine and frigid to the touch. Onaidred's Quill, an artifact crafted centuries later and responsible for the creation of Nym-Zoedine, was forged from one of Onaidred's own quills.
In the Horgon Era, the frost giant stronghold Tholamid was constructed within and surrounding Onaidred's ruins. Since that period, Onaidred's Remains has been employed to forge ice and frost-based magical equipment.