He's making the mother of all omelettes...same goal but the means are too extreme
All of MC's magical knowhow is a thousand years out of date, and even the Sage that existed back then knew things Yuji couldn't conceive of like tracking lifeforce. This Lab is basically the Institute from Fallout, they've just been in the background amassing knowledge and experimenting to advance technology for so long that they completely lost sight of their goals. That's thousands of years of preparation, and no Team Rocket gets blasted off by Ash, or the authorities, no attacks got near this mastermind.JP authors with "villians that mysteriously run away (even though the power creep logic violates their own universe's rules)" is a bit disgusting. Feels like Power Rangers, more than Ringworld. Or kindergarten kids playing make-believe, not military record.
It's not even power creep. It's sheer plot armor. Escaping requires preparation and labor, potentially losses if the operation is botched.
Instead, we get this "Team Rocket Is Blasting Off Again" nonsense. The in-fiction universe would have evolved completely differently if such "instantaneous escape" power existed. Like counter-spells, detectors, tracing technology. Or military tactics surrounding that. (See: "The Gospel of Mr. Henderson" WN for good example, based on D&D and "kill on first sight" strategies.)
Whoever this "mysterious villain" was can resurrect the dead, enslave saints, manipulate souls, summon world-ending dragons, avoid the most powerful spells in their universe, and also teleport at will. There's a limit to disbelief.
This guy treats people as necessary sacrifices to save the world, while the rest of the lab sees them as lab rats for their research.That guy really has a lot of knowledge on magic. He could manipulate the lifeforce of countless people, resurrect someone, use a drone like magic for surveillance and now burn all the other people in the lab and escape through some form of teleportation.
I'm confused by his morals though. He states he doesn't kill for his own experiments but literally sacrificed Teaf and was consuming the magic power of a city's worth of people, which was killing them, for his experiment on determining if the new hero was more powerful than the resurrected hero. I guess he means that he has a purpose of saving the world justifying the sacrificed lives while I guess other lab members only have the purpose of doing more research. I mean sure, you could say that it's similar to being willing to mobilise soldiers to fight, and die, to defend the country against a threat and it's not like the true dragon is something you can negotiate with, but he's quite extreme and he's embraced the methods of the labs which involve harvesting human life indiscriminately.