Cultivation of Immortality in the End of the World

Traveling through the world of immortality, Zhang Heng turned out to be a wild boy raised by a she-wolf, but accidentally stumbled upon a magical doomsday world! But before he could explore the opportunity, he was kidnapped by the First Saint Demon Sect and turned into a drug test rat to be slaughtered. Next, Zhang Heng endured and survived in the world of immortality, squeezing the resources of the Demon Sect! And while plundering opportunities in the doomsday world, tempering the body. What about Ding's qualifications and the five elements' spiritual roots? Traveling between two worlds, changing fate against the will of heaven, let's see how the waste Zhang Heng successfully counterattacked from being a drug-testing slave!