They Called Me A Madman, I Killed Their Genius.

Everyone dismissed him as a harmless lunatic, babbling about living through forgotten eras. To them, Fang Xuan was an insignificant speck, a peculiar drifter in the vast cultivation world. But his \"madness\" was truth. For countless eons, he existed as an ethereal observer, unseen and untouched, the true oldest being. Now, for reasons unknown, he can finally interact with the world. When an arrogant, world-renowned genius dares to test his seemingly frail demeanor, the ancient one takes his first definitive step, effortlessly snapping a neck and shattering imperial taboos. The world now sees him, but can it comprehend the terrifying scale of his newfound, unstoppable existence?