Of course, Zhou Sui didn't just spend these hundred years increasing his cultivation.
Most of his energy was actually spent on the Hundred Arts of Cultivation, as well as various Divine Arts.
It was because of this that his Alchemy Dao, Artifact Dao, Rune Dao, and Sword Dao had all reached the realm of the perfection of the Fourth Stage, and were just a step away from advancing to the Fifth Stage.
This was a huge bottleneck that naturally could not be broken through lightly.
But even so, he had already reached the limit of a Nascent Soul Cultivator.
Throughout the entire Cultivation World, including places such as the East Wastelands under the rule of the Human Clan, there could not possibly be any Nascent Soul cultivator who had achieved the same level as him.
However, the area in which he had made the most progress was the Divine Arts.
The Five Elements Thunder Law he practiced had reached the Skilled Level, and the Ku Rong Mysterious Light had reached the Grandmaster Level.