Douluo: with Full Proficiency, the Soul Ring Can Be Upgraded Infinitely.

Traveling across the Douluo Continent, the protagonist Lin Yuan awakens a unique omnipotent proficiency system. The life span of other people's soul rings is fixed for life. The upper limit of the first soul ring is a hundred years, and one must die if he reaches higher levels. But Lin Yuan only needs to continue to use soul skills, polish martial arts, and accumulate proficiency in actual battles, so that the soul ring can independently break through the shackles of the age limit. There is no bottleneck in one hundred years → one thousand years → ten thousand years → one hundred thousand or even one million years. There is no need to hunt high-level soul beasts, and there is no risk of body explosion and backlash.