Starting from a Small Blood Tumor, It Mutates Infinitely

Ning Xu, a high school student, discovered one day that he had a soybean-sized sarcoma called hematoma on his body. He didn't take it seriously at first, but a text message from an unknown number completely changed Ning Xu's life. What do you mean this blood tumor will eat up my life force and I still have no way to reverse it? What does it mean that as long as the blood tumor is on my body, a mysterious organization will continuously send monster-like mutants in an attempt to take away the blood tumor on my body? Also, what does it mean that once the hematoma leaves the body, the host will definitely die? The co-author will either be drained by the blood tumor or be separated by the mysterious organization. Either way, he will die? Ning Xu said that I don't choose either. I choose to use the ability that the hematoma brings to me to find the mastermind and unlock the secret behind the hematoma!