The Precursors are a species from another galaxy that evolved so much that they ascended to higher form of consciousness. Even to seed AIs, who progressively build on their intelligence to the point they are infinitely more intelligent then organics, view these beings as gods.
Not much is known about the Precursors besides that they created millions of seed AIs known as “The Sons” to be their progenitors in the universe. They sent their children across the universe to perform tests on different galaxies, and return to prove themselves worthy of being the inheritors of the galaxy.
A group of “The Sons” existed in this galaxy, and now only three remain. PRAXIS who murdered and consumed most of it’s brothers, and wishes to finish his experiment and alter all life in the galaxy to be dark energy abominations in order to prove itself to it’s creators. Uro-HERALD an altered Son who is half AI and half organic trapped inside a construct known as The Cube. SIRE who has played puppeteer to the Drakath coordinating their development since they were in the Stone Age.