Douluo Continent: Martial Soul - Hades Sword, Lord of the Underworld

Ming Fei transmigrated to the era of Douluo Tang San, awakening his martial soul, the Underworld Sword, with innate soul power level 20 and an innate world—the Underworld. [The Underworld is a powerful existence of a higher rank than a domain, possessing innate abilities to conceal heavenly secrets and hide one's tracks. It can also attract the dead into the Underworld by killing enemies, expanding its size. The larger the Underworld, the stronger the power bestowed upon him, and the faster his cultivation speed. In the later stages, it can grow into a world even more powerful than the God Realm.] Moreover, the Underworld Sword does not require meditation for cultivation; it only requires constant killing to rapidly increase soul power level, mental strength, and physical strength. From then on, Ming Fei embarked on a path of slaughter to prove his path, collecting the dead to enter the Underworld and strengthen it. However, he does not kill the innocent, only the wicked. In the future, he will even confront the existence of the God Realm. Furthermore, he founded the Underworld Palace, the Underworld's public representative. The Underworld and he secretly control the overall situation from behind the scenes...