Planet Eaters
The "Planet Eaters" are a semi-artificial multi species entity of unknown, possible extragalactic, origin. Believed to be the result of advanced genetic manipulation technology gone rogue, they consist of a wide variety of constantly changing artificial species united by a hive mind. Possessing organic technolgy, and the ablity to integrate with looted synthetic technology, as well as vast numbers, they are a significant threat to most other lifeforms in the galaxy.