Precursor

Summary
The Precursors are Practically a race of Gods, spread across countless Omniverses throughout the Multiverse and are even believed to be the creators of life itself.

Biology
The Precursors are the true "Perfect Lifeforms", completely immune to disease, almost impossible to actually kill, and Psionically gifted in ways beyond mortal comprehension. their DNA acts in a similar fashion to [https://en.wikipedia.org/wiki/Strangelet#:~:text=A%20strangelet%20is%20a%20hypothetical,to%20be%20considered%20a%20particle. Strange Matter], converting regular DNA into imperfect Precursor DNA upon contact with any organic material, carbon or silicon based. Physically, Precursors seem to stand on average about 20 - 50 Feet tall, and have fairly slim and sleek bodies. Precursors like the 13 Star Gods, however, have drastically differing bodies, not only compared to regular Precursors, but to eachother as well. For example, the Starfather is said to be a shapeshifter, appearing as godly-figure resembling a member of the species of the being that it speaks to, while The Maw is said to be a colossal mass of flesh and tentacles that endlessly drifts through space.

History
Practically nothing is known about the origins of the Precursors, or how they came to have almost complete control over the Multiverse, so many theories have been created to explain their origin, with one of the more well known ones stating that they are the physical manifestations of the Multiverse itself, which would explain their seemingly nonexistent origins.