Eternal Life in the Prison: From Body-Tempering Inmate to True Immortal of the Mortal World

【Suppression-focused + no heroine + ruthless + the protagonist isn't a do-gooder, he crushes anyone who dares defy him!】In the twenty-eighth year of the Zhaoning era, Lu Zhenyuan transmigrates into the lowest-ranking jailer in the Celestial Prison. Imprisoned here are a mad Taoist who burned cities to the ground, an Imperial Preceptor who slaughtered entire armies, a demoness who bewitched all living beings... Any one of them could kill him a million times over. Lu Zhenyuan has no choice but to read people carefully, until he discovers that every demon he suppresses can be refined by the 【Demon-Suppressing Cauldron】 into a reward... Suppress the mad Taoist for twenty years, and he gains the Innate Tyrant Physique Art, letting him burn mountains and boil seas! Imprison the Dark Nether Serpent Dragon for fifty years, and he gains nine hundred years of cultivation, enough to cleave through the Ninth Heaven with a single sword strike! Even the demoness who beguiled all living beings, after being imprisoned for sixty years... becomes utterly devoted to him? For a hundred years, Lu Zhenyuan quietly reaps benefits from the strongest beings across the heavens. Until the Demon Venerable leads a million evil spirits in a siege on the imperial city and kicks open the gates of the Celestial Prison. “Mortal, why aren't you on your knees to welcome me?” In the dim prison, a figure sighs. “I've kept my head down for a hundred years, and you are exactly who I've been waiting for...” That day, overwhelming sword intent crushed the demonic clouds. Only then did the people of Great Zhou learn that hidden in the Celestial Prison deep within the imperial palace was a... true immortal among mortals, capable of suppressing all living beings with a flick of his finger!