Ulith III Biophage

Also known as the Inflictor by the Romulans, and the Beast by the Kadeshi. The Ulith III Biophage is a sentient nanite swarm that can infect both technology and living tissues, often merging the two together to serve as biomechanical computers and control systems to boost the entity's own intelligence and processing power. The Biophage is capable of taking control of starships, and of devouring all living matter and technology on an entire planet. It appears to have no goals or desires save spreading throughout the galaxy and devouring everything in its path.

This entity was encountered and subsequently defeated in the conflict known as the Ulith III Biophage Crisis.