War Plan and the Awkward Underworld Teleportation Array, Four Thousand Words

What was truly terrifying was that all two thousand of them possessed Twin Martial Souls, as well as purple soul rings that were at least over five thousand years old.

They started at five thousand years, completely crushing the optimal age ratio for an ordinary Spirit Master's First Soul Ring by more than ten times over!

The Age Limit Enhancement Method was good in every way, and its leveling speed definitely was not slow.

But the only two things restricting that leveling speed were the realm of one's Mental Power and the strength of one's physical constitution.

The amount of Mental Power one had was tied to the speed at which the Age Limit Enhancement Method raised a soul ring's age.

The strength of one's physical constitution was tied to the exact number of years that could be increased in one go, as well as the length of time before the Age Limit Enhancement Method could safely be used again.

Not everyone was as powerful as the upper ranks of the Undead Empire, nor did they have the corresponding Heavenly Materials and Earthly Treasures and soul bones to assist their improvement.

A higher soul ring age would certainly bring a Spirit Master an improvement in physique.

But if too much was raised all at once, and the body had no time to adapt, then it would burst apart like a balloon.

Ten thousand years ago, the first Twin Martial Souls Spirit Master recorded in Douluo Continent's history had died from her body exploding because she had added too many soul rings too quickly.

Later, it was Bibi Dong who summarized the correct cultivation model for Twin Martial Souls.

Within Douluo Continent's traditional Spirit Master system, only after reaching the Titled Douluo realm would one pay attention to tempering the body.