Read up to ch 662. The best webnovel I've ever read. It starts slowly, but then picks up pace. The characters, the world-building, the power system, the philosophy, the mysteries, the revelations and the MC's constant introspection are all incredible. Of course, it's not perfect, the romance is meh, the MC sometimes acts silly, and the author likes to torment him a lot, but this, in my opinion, gives it a greater impact when the MC achieves his goals, especially in the last 500-600 chs. A true masterpiece in my opinion.