I Don't Have Enough Longevity, so I Have to Kill All the Demons

In the world of purgatory where demons are rampant and cruel and terrifying. The immortal path is incomplete and the spiritual energy is filthy. Wang Yuan can consume his lifespan and perform the deductive technique quickly. Kill the monster and you can get all the remaining life span of it. Kill the newborn demon and gain a hundred years of demon longevity. After pouring a hundred years of longevity into [Xiuchun Sword Technique], his sword skills instantly became superb and he became a unique sword master among the common people. Kill the big demon who enters the country and gain two thousand years of demon longevity. After pouring two thousand years of longevity into the [Treathing and Inhalation Mind Technique], he understood all the mysteries of true energy, penetrated all the meridians of the human body, and sublimated his internal strength into the [Swallowing the Sun and the Moon Divine Art]. Kill the demon king in disguise and gain 30,000 years of demon longevity... Kill the peerless demon emperor and gain a hundred thousand years of demon longevity... All living beings are reduced to livestock, and they can only tremble day and night, praying that they will not encounter monsters. But Wang Yuan drew his sword and looked around, but he only hated that there were too few demons. I vow to live for hundreds of millions of years and take away the lives of all the demons in the world. Help him, martial arts can lead to the gods! ———— When Wang Yuan killed all the demons in the world, but still could not deduce the true method of immortality, he planned to sit back and wait for death. He looked up. But I saw that there were thousands of fairyland above the sky. Many immortals, saints, gods and Buddhas sat on it, all of them had survived for countless epochs, looking down at the lower world indifferently for a long time. All disasters and tragedies in the world were created by his own hands. Release your spiritual pets at will, let them go out to play, and let them wreak havoc in the world and transform into the ancestors of demons. Looking at these sanctimonious immortals, gods and Buddhas, their bodies and hearts have long been distorted beyond imagination. Wang Yuan was suddenly surprised to find out. It turns out that there are still demons to kill in this world.