The Technocratic Union are the primary antagonists to the 9 Traditions. No so much purely evil for the sake of evil but a well funded highly authoritarian secret society ideologically opposed to the Traditions. The Technocracy brought us modern plumbing, vaccination and modern medicine, toilet paper, and nuclear weapons, advanced bioweapons, capitalism, and the prison industrial complex.

The Nephandi are the evil for evil sake mages. They are seeking to spread as much pain and misery and bring in the descent of humanity into destruction.

And then there's the marauders, mages who's magickal hubris gets the better of them and they succumb to a reality warping madness.