A Supernatural Apocalypse

How is it "Obvious". It is over +1000 chapters so it should be getting into the final arc at least

Exactly, I was looking for a theme in the wrong story.
But I'll keep reading since it's still not bad.

A bit cliche with MC knowing and remembering a vast amount of knowledge that is way ahead of everyone else, but worth a read if you are looking for magic-wizards-alchemy novels. The writing is good even though I wish the author would not keep using all the usual tropes (absent parents, arrogant bullies, face-slapping, underestimated MC, etc.). I was searching for good novels with magical setting (like Warlock of the Magus World, When a Mage Revolts, Advent of the Archmage, Night Ranger), and came across this- it's reasonably good at least up to the current chapter 58.