Metropolis: After Cultivating Immortality, I Became a Hidden Boss

In his previous life, Ning Fan was a member of the countless army of dog lickers, and was fished for by a female PUA until he died... After resurrecting his life, he returned from cultivating immortality and wandered around the city to stage the return of the king! Finally became a hidden boss! Ning Fan: Those who are kind to me will repay me a hundredfold, and those who are unkind to me will not be spared! [Pseudo-invincible + cool writing + decisive killing]