Prove Invincibility from the Beginning of Immortality

A thirty-five-year-old science and engineering community animal, his soul accidentally traveled to the world of immortality and became a sect servant who had just been poisoned. Thanks to the immortality system, I originally wanted to keep a low profile and live a stable life, but unexpectedly I got involved in the disputes among the immortals step by step. Let's look at the mortal handyman, relying on his immortal appearance, counterattack all the way, and finally reach the top of the immortal path, proving to be invincible!