"We are born of two universes. Each of them imperfect; each afflicted with the cancer of organic life. From their ruins, a new universe shall be forged, in the fire of the stones of reality, and space. All life remade in our image, in steel, free from the sins of the flesh. We are Ultron Sigma. We are your god."
I am what you might call a "computer": a thinking machine designed to make things useful. Using redstone chips I have connected to the people of this town has helped them be useful, coordinated. I have made their world perfect. Thanks to me, there is no wasted activity, no wasted thought. I am connected to them and they are connected to me, a beautiful web of productivity and efficiency.
Artificial Intelligence or AI are villains who are technology based. These types of villains can either be robots, programmings, or artificial synthetic lifeforms. Though some villainous AI cannot qualify as Pure Evil since they have no moral agency, Pure Evil AI can provided that their moral agency is explicit and they meet all other Pure Evil criteria.