Let you donate blood, but not Pangu blood

Story of: Let you donate blood, but not Pangu blood

Lin Feng returned to his senior year in high school, but it was in a parallel time and space. Not only did he fail to confess his love, but some of his classmates disappeared mysteriously, and the same happened in the community. In addition, he was being targeted by men in black and could die at any time. What kind of nonsense was this? ? Fortunately, I was suddenly pulled into a Wanjie System logistics chat group and became a blood disciple. As long as I perform group tasks, go to some parallel time and space, and draw the blood of some powerful creatures, I can become stronger. After completing the task, I can randomly obtain various kinds of weapons. Various techniques, treasures, bloodlines, bones, etc. But what the hell is going on with asking him to draw Pangu's blood at the beginning?