I'm Not an Immortal, but an Immortal Can't Take My Punch!

[No system + No heroine + Invincible at the beginning without upgrading + Physical training + Easy + Refreshing article] Xu Kun traveled to the fairy world and obtained the invincible fitness method. The old, weak, sick, disabled and big cocks who followed the fitness became the overlord of the party, and he became invincible in the world. Who dares to claim to be invincible? Who dares to be invincible? Even in front of me, Xu Kun, there is no one who can take my punch in this vast world of immortality? PS: Immortal cultivation realm: Qi refining, foundation building, golden elixir, Nascent Soul, spirit transformation, void refining, body integration, tribulation transcending, Mahayana; The protagonist is absolutely invincible! ! !