Doomsday Gaowu: Start Killing Monsters with Krypton Life from Summer Vacation

The world is doomed, and monsters are rampant. Ninety percent of the world has been reduced to a wilderness area, and humans live in safe cities under the protection of the federation. As an untouchable from the outer city, Shen Xi has been in this world for sixteen years. He, who originally went to school in the inner city due to his talent, finally had his summer break. But at this moment. After the conflict with the school bully, everyone except him died at the mouth of the demon. Shen Xi, who was desperate, activated the Krypton Life System. [Cultivation: Introduction to Blood Training] [Martial Arts: Bajibeng (Basic Martial Arts) (Introduction)] [Life span: 41 years remaining. [Consuming lifespan can speed up the progress of martial arts and improve your cultivation level. … With the help of the system, Shen Xi completed the counterattack. But as a result, on the first day of summer vacation, he was forced to embark on a journey of escape into the wilderness...