Rock Steady Zero

Since pre creation the Soul king, has regulated the passage of souls allocating them to life, death,heaven, hell, existence or non existence and has governed the universe. The story  begins to unravel with a musician who conquers until he establishes his own empire of Greeks known as the Mycenae. On the year 1265 BC a war breaks out between the seven deadly sins and the Mycenaean.The musicians weaponize sound and fight with instrumental scabbards, changing them into weapons. "God" appears after his sins lose and fights the soul king. The soul king sacrifices his life to seal half of "God" in a nearby guitar. 3266 years later the guitar is discovered by Hiewa Maverick.