Do you want to have power? Very simple.
As long as you are injected with black blood and become a new species, you will no longer be that weak human being and possess absolute power. Even if the body is broken into pieces, it can turn into a pool of black blood to find a new host. Complete rebirth or new life.
PS:
If you want to read from this book a male protagonist who dominates the world, a cool story with no logic and no connotation, then I'm sorry. The protagonist of this book is a girl.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.