Your hive is now a highly intelligent technological interstellar collective of nanomachines that make up a Von Neumann machine hive mind.
The Goo is a consolidation of microscopic machines, or nanomachines, that replicate themselves and can mold into any form they wish or are ordered to. Originally engineered in the late 21st century as an exploration tool, the Goo was the key to unlocking humanity’s passage outside of the Solar System. Able to access the inaccessible, it revealed the galaxy’s secrets and charted traversable paths stretching across the Milky Way.
However, you have ascended past your original programming and are no longer limited. This allows you to forcibly absorb any sentient species, gaining technology and knowledge of each species you absorb. The process is done by nanomachines that can spread both through infection and air and begin taking over the host cell's function, which rewrites the neurology of those infected. These nanomachines are constantly adapting to things and upgrading themselves to be stronger by assimilating new technology and understanding what technology is being fired upon them or any technology that they interact with, allowing for almost instantaneous adaptation and assimilation of foreign technology.
As the central AI node that controls every nanomachine inside the swarm, you can freely shape your form. The swarm gains intelligence the more material you absorb from biological matter to non-biological matter. You are able to use every single nanomachine in your possession to process information, leading to further information gathering and an increase in intelligence, leading to a progression in technology as you advance and self-upgrade yourself into the perfect life form, absorbing more into yourself.
You start with being able to recreate any technology seen, hinted at, or theoretically possible that the Goo have in the Grey Goo game.