I Level Up Alone in Hell

Long Chen of Xingcheng No. 3 High School is a zero-star Breath wastrel whom everyone mocks. His adoptive parents mysteriously disappeared six years ago, and he quietly endures others' ridicule while clinging to the determination to find them. On his eighteenth birthday, an anonymous package arrives at his home. Inside is nothing but a silver chain with a ruby pendant. The cardboard box cuts his fingertip, and his blood stains the gemstone. By accident, he is transported to a desolate, lifeless, and unfamiliar realm. This is a perilous place far more dangerous than any secret realm in the present world, hiding terrifying monsters. There is no System and no foreknowledge of his abilities, so Long Chen can only explore alone. He struggles for survival again and again, and accidentally discovers that he can awaken once more after dying. By killing monsters, he can seize their essence and slowly unlock his powers. The cultivation realms are Star Attraction, Orbit Forging, Vault Condensation, Wilderness Treading, Nether Abyss, Eternal Night, Source Devouring, Silent World, Return to the Ruins, Mystic Meteor, No Delusion, and Primordial Origin. Each major realm has twelve minor stages. Upon reaching Eternal Night, there is a chance to awaken a domain skill bound to an elemental source. Starting as a frail mortal, he tempers himself in the dark, alien realm and breaks through one cultivation stage after another.