From the Start with a White Bone Martial Soul, I Explore All Under Heaven

Three thousand years have passed since the sages ascended to Heaven, and none have returned. The spiritual energy of the world grows thinner with each passing year. Everyone laughs at Ye Zhao, the illegitimate son of the Marquis's household, because his martial soul is a pile of bones. No one knows that those bones can hold all the battle intent under Heaven. He copies martial arts from the dead and scavenges blades from ancient battlefields, following a catalog of a hundred weapons as he fights his way to the Heavenly Gate and knocks open the very gate that was shut all those years ago.