Counterattack System appeared when I'm already At The Mahayana Realm - Chapter 509: 508: Trial by Yama

Zhong Li, an orphan in the 21st century, was wondering how to collect the fees for his college study on the street, when he was suddenly hit by a car, which threw him into a river. An orphan’s disappearance would not bring too much attention to the world, but this accident gave Zhong Li another chance of living a glorious life in an immortal world. When he woke up, he found himself lying in a magnificent yet strange palace built of all gold, but had no door. An immortal claimed to be his savior and wanted to train Zhong Li with all of his cultivation methods, only because he was too lonely and wanted a disciple to keep him company. When Zhong Li finished his study, the master would tell him how to go out of the palace. Zhong Li never thought that the path to immortality would bring him to the fate of becoming a dragon.

- Description from Novelupdates

mc gets transmigrated to Fallout New Vegas with the merchant system. let the questionable adventure begin.

Rosemary spent 18 years thinking she was a member of the wealthy Harris family, only to discover she was a fake rich girl. When the real heiress returned, Rosemary was cast aside and sent back to her poor hometown. But fate had other plans for her, as she soon discovered that her hometown was actually the most exclusive villa area in the country. In a single night, Rosemary went from a modestly wealthy girl to the true heiress of a top-tier elite family. Her biological parents showered her with love, handing her millions of dollars in pocket money, providing access to any car from their fleet, and letting her buy anything from the world’s top designers. As for school, the best institutions were at her fingertips, and if she didn’t feel like studying, she could play with the family company.But what shocked Rosemary the most was finding out she had an ex-fiancé. She couldn’t understand why he kept clinging to her, holding her hand, and trying to kiss her. “Who are you, sir?” Rosemary asked, annoyed. “Sweetheart, I’m your husband,” the ex-fiancé responded. “I don’t have a husband, only a former fiancé”

The world was destroyed by meteorites and everyone on Earth transmigrated to a wasteland.The wasteland would encounter an unpredictable catastrophe every seven days. Some of the catastrophes included the great flood, ice age, invasion of demonic beasts and plague of plants.In order to survive, mankind had to build more advanced shelters.Lin Yue awakened the 100 Percent Drop Rate System, allowing him to live a very different life from the others.Other people lamented, “The drop rate is too low, isn’t it? I have killed 50 mutants, yet I still have not gotten any drops!”Lin Yue lamented, “I have way too many drops and my item list is now full. Could it be that I have to upgrade my shelter and build a warehouse for all the drops? Tsk. That’s so troublesome.”