My dantian has dragon balls

Introduction: An idle playboy was struck by lightning unintentionally, and a dragon ball appeared in his dantian. From then on, he started the rampage mode... Kill the demon king, slay the demon emperor, beat up the genius of the human race, and use his invincibility to... Reaching the pinnacle of martial arts.Note: This is an invincible article. The story of Pig's Foot defeating all enemies with its invincible magic power. (The early stage is a little dull, but after ten chapters, it becomes invincible, and the pig's feet are completely out of control. It's absolutely explosive!)