In the first year of the Dawn Era, a primordial with the powers of creation, centuries before the term Creationist came into usage, began forming worlds out of the energy and matter floating aimlessly about Chaos. It is said that Piranoth rushed his work, creating so many worlds that corruption seeped in. One theory is that someone took affront to what he was doing, poisoning his work. Perhaps there was truth behind this, for many Primordial Lords of these early times, Piranoth was creating order out of chaos.
Piranoth's first world, the Step of Foundation, seems to have been the root of the corruption that came. This world had many rifts. It served as a hub for shuttling energies and matter from Chaos to the vast system of stars and worlds that would become known as Piranoth's Steps.
The Hirstyr Signir monolith has writing on it that say over thousands of years, the Step of Foundation absorbed corrupting energy, including baleful life forces, that perished across Piranoth's Steps. This dark energy sunk to the first world, coalesced, and then reversed course, spreading outward along the rifts, like tendrils of corrupting darkness. The tendrils were evil energies that fused with the chaotic energies of Chaos, something termed by Bruh Kreniik as the Threads of Damnation. These "threads" worked their way outward from the Step of Foundation and then across all the worlds of Piranoth's Steps.
The Threads of Damnation created the demons that are so prevalent across what today is called the Abyss. Most came about from chaos aberrations created by Piranoth to serve as soldiers of Chaos, minions of various primordial lords then engaged in the Dawn War. The demons rose up against the primordials in the Abyssal Release. Battling Covenant forces in the Dawn War and demons in the Abyssal Release proved too much for the primordials. They were drove out of the Abyss and out of the Mortal Systems.