He is an alien creature who fell from the sky and kept saying that I was the master of his destiny and would help him win the Three Kingdoms War on their planet. I learned magic from him and soared through the sky. Once when I fought with enemies from other countries on their planet, I was defeated. When I woke up, I was in a mysterious iron chain prison. The familiar shadow in front of me wears a crown and tells me that as long as I donate the blood sworn to him, I will be allowed to return to normal life. Otherwise, his life will be at risk. How should I choose?