One Sword Is Eternal: My Attack Power Is Infinitely Upgraded

[Decisive killing, multiple female protagonists, system flow, extreme counter-killing] Special soldier Xiao Yang traveled through the fantasy world and became the notorious good-for-nothing young master in Qingyun City. However, he unexpectedly awakened to the "One Blade 999" system - each attack will permanently increase the damage by 999 points! However, the price was cruel: his cultivation would always remain at the first level of Body Tempering, and he would be unable to break through for the rest of his life. "Good-for-nothing? I'll chop you like a vegetable with one knife!" Starting from the family competition, Xiao Yang used his first level of body tempering to defeat the genius with one sword, kill monsters with ten swords, and split mountains with a hundred swords! Qingyun City was shocked, and the three major families were shocked. Even the iceberg saint Liu Qingxue and the cold killer Su Muqing looked at him differently. But with the emergence of ancient ruins, Xiao Yang discovered that the system was actually the ancient forbidden technique "Seed of Heavenly Punishment", and the Dark Palace Organization was already eyeing him... As a useless person with an eternal cultivation, and possessing infinitely growing attack power, this fantasy world was destined to be hacked by him with one sword to carve a path to the sky!