431 collective consciousness

The Controllers were unlike any enemy the Maquivina people had encountered before. They were not typical carbon-based life forms, but a group of formless yet substantial energy-based life. They were nearly immune to all forms of physical attack and extremely agile, with a high evasion rate against energy weapons. Of course, the most terrifying aspect of the Controllers was that, after using the Eternal Crystal Stone, they could rapidly reproduce infinitely in the face of the enemy and control human bodies to combat the adversary.

More unluckily, this was the Maquivina's home star, where they could not employ unconventional weapons of mass destruction to wipe out the Controllers, as it would also result in the annihilation of their own planet and a large number of their fellow Maquivina.