Invincible: Soul Venerable of the Highest Rank

This is a world of Martial Souls, inhabited only by soul beasts and humankind. The sea folk and winged creatures are soul beasts, too.

A Martial Soul determines a person's entire life. Everyone awakens one.

There are countless kinds of Martial Souls. There are Martial Souls you can't even imagine, and none that don't exist.

Soul power, soul arts, and soul skills are all tied to the Martial Soul a person awakens.

In truth, Martial Souls have no inherent ranking of strength. It was humankind that arbitrarily divided them into grades for the sake of cultivation.