Nigh is the avatar of the City Mind, the paragon of all war machines built to destroy the gods of Rym. It was Nigh that struck down the astral leviathan, Halus, in a cataclysmic battle fought between Rym and its moon, Zunat. Nigh is an aetherplane fighter forged of the Creators' most destructive technologies, a nightmare weapon now guided by the mad City Mind., constantly scanning the surface of the planet from the upper atmosphere. It searches for prey, hunting for the energy signitures caused by great sources magical power, such as gods, avatars, and unconcealed artifacts. 'Nigh', in the Creator tongue, means 'Godslayer', or 'No Tomorrow'.
Nigh's construction spanned generations, and consumed more resources than all other construction put together. The City Mind laid out its plans, and the Creators built to their artificial god's exact specifications. Each wing was to be a mile in length, covered in ornately ingraved plates of the black steel, adamant. It was to be propelled by six giant engines of searing blue fire. Many who helped to construct its horrific weapons were said to have later killed themselves, or gone mad, and even the Creator High Command was concerned about the powers being used. Some spoke openly against the project, and were put to death. Others resigned their positions and were exiled in humiliation. Its construction caused a rift between the once harminious Creators; those who shared the City Mind's fanatical hatred, and those who felt that things had gone to far, and that all of Rym would pay the price for their childish war.
The second party was right. It soon became clear that the City Mind was willing to sacrifice anything and everything to win the war against the gods. Nigh's weapons rained death upon the burning face of Rym, anihilating avatar and Creator alike. It was unstopable. Millions fled the cities as the Machines took full control, enslaving those left behind. In the final days, as Nigh rocketed towards Zunat to engage the gods directly, and poisonous fire wound across the dying land, amid mass suicides and madness, the last remaining members of the Creator High Command attempted to sabotage their artificial god. They failed. For a few seconds, power was lost. Nigh's great engines shut down, and every monitor went white with static. In that instant, the youngest of the goddesses, Kij, escaped.
Nigh still searches for Kij, its ancient UPM parameters unfulfilled. It has mistaken many hapless targets for the goddess over the centuries, including a small number of extremely powerful sorcerors, two ancient dragons, and the Spiral siphon, Arborat. Ordinarily, any concentration of extremely powerful magic will attract the attention of the ancient war machine, and result in the anihilation of the target and surrounding countryside in a column of blinding white light.
Why would I create a huge being that cannot be defeated? Because it's not really a being, it's more like a factor, and like any factor, it can be used to one's advantage or one's detriment. Nigh is my answer to everyone who's flipped through 'Deities and Demigods' thinking up ways to defeat the various divine beings. Nigh plays an important part in the campaign which may become clear later, but for now, it's just the big terrible monster that everyone's afraid of. No paragraphs of details, no specifics. I found that one of the best ways to get PCs to fight beings that are never meant to be fought is to give those beings stats, treasure, and experience values. Incidentally, if you've ever seen 'The Wall', you'll know what inspired this technological nightmare.