The End of the World! I Have a Fantasy Card Drawing System

The end of the world! After six years of hard work, mankind was finally defeated. Su Bucheng, who lost everything, awakened the system at the moment of death. With the help of the system, Su Bucheng returned to his college days, two months before the end of the world. This time, can Su Bucheng, who has been added by the system, change his own destiny? Is the arrival of the evil spirits outside the prison an accident or a necessity?