1) If your assertion that the foundations of modern science were false, then none of the modern technology based on that science would work. Assuming this message travels from my laptop to the wider web, that does not seem to be the case.
2) Yes, there is plasma in blood. It's the liquidy part, the stuff left behind when you strip out all the blood cells. This plasma is not the same as quantum plasma, which is just hyperheated matter in a fully energetic state.
3) Your entire conspiracy depends on the whole human race being wiped out or losing it's memory. Why did nobody ever ask, “hey, whatever happened to that vast global empire that ruled our lives and provided us with Magitek?” Did they not notice? Or, did it never exist at all. If the PTB covered up the Empire’s existence so thoroughly, to the point that people who would have lived in the Empire at the height of it's power have no memory of the Empire, then how did you learn about it?
4) I'm looking to experiment with powerful hallucinogenics so as to experience a journey through the cosmos. Hook a brother up?