In the world of the Immortals, he had cultivated in order to become an immortal and it totally depended on the time spent on cultivation. Under normal circumstances, the longer the cultivation time was, the stronger the cultivator would become. So if someone possessed the cultivation of a decade, then he would obviously be much stronger than those with a cultivation of five years.
Before coming here, Ye Feng had cultivated for 10 years in order to become an immortal, but after coming to this metropolis, he had completely lost his hard-earned cultivation in an instant.
He wanted to improve his cultivation as fast as possible in order to become an immortal and for that, he needed to practice a cultivation method so that his cultivation would keep on increasing steadily. There were a lot of ways to increase the speed of cultivation, like by consuming some of the heavenly treasure medicinal pills, or relying on other fortuitous encounters. If his luck went against the heaven’s will, then even if he were to practice only for a year, he could obtain ten years worth of cultivation.
In order to become an immortal, the cultivation of a decade was like a watershed.