Precursor

The Precursor are a race of unknown aliens who are known to have traveled across universes and populated many planets with their relics and their advanced technologies. They were known to have traveled to numerous galaxies and create planetary systems, and created and influenced the evolution of sentient life.

Known History
Most of the history of the Precursors is more of legend than actual written history. According to Tyrll scholars, some 20 billion years ago the Precursor came to this universe from an unknown point of entry, and began to influence the earliest lifeforms. After some 50 million years they began to build massive star systems and even sculpted out superclusters in the Arkhangelsk Universe.

After this period of sculpting and expanding the universe they began to create relics on every planet they had created. After some unknown amount of time they created the The Relic of Rukhial which is a giant supership that has the ability to decimate an entire universe. The Relic of Rukhial was put under the crust of Rukhial and left. After the creation of many relics and space constructs, they encountered an unknown entity, and preceded to engage in an interstellar war.

The eventual fate of the Precursors is unknown, many theories exist such as an interstellar plague, a destructive war, and transcendence.

Speculations
The most recent speculation is that the Precursors were killed by the Paracytill who may have been there creations. This could explain the demise of the Precursor and the ability of the Paracytill to travel into different universes.

Another speculation is a galactic war that destroyed all the Precursors, or that they transcended into another layer of thought, that is indistinguishable to others.