In the Pile of Zombies, I Stood up by the Time Stop!

The copy of National Games randomly selects people to fight zombies in the apocalypse, and all mankind watches live. Luo Chen, who traveled through time, was drawn. On the awakening day of the whole school, he was the most useless, but in the result, he was chosen in the lottery of the National Games. The barrage was full of ridicule. Some students in the gymnasium were laughing and some were covering their eyes. At the beginning of the dungeon, seven zombies attacked my face. Luo Chen was pushed to the ground, and the zombie opened its mouth and bit his neck. Luo Chen is about to confess here. Fortunately, the time bank system was bound in time. At the critical moment, he advanced the price of 30 years of life and awakened the SSS power: time pause! Then the screen stopped moving. He gripped half of the steel pipe tightly and stabbed through the heads of all the zombies in the still world! Three minutes later, the screen returned to normal, showing seven corpses falling down at the same time. There was dead silence in the stadium, and the comment barrage exploded: "What happened?!" "... Why are all the zombies dead?" ... Everyone thought he had awakened some heaven-defying power, but only he knew that the line of pale golden numbers on his wrist was falling every minute. The thirty-year life expectancy is reduced by one second every second! Want to extend your life? Kill zombies! Kill high-level zombies to earn time coins. The more you kill, the longer you will live! Luo Chen looked down at his wrist. -29 Years, 354 days, 23 hours and 57 minutes. That's all that's left. He clenched the steel pipe in his hand, looked at the zombies he had killed expressionlessly, and asked the system: "How much are these worth?"