The Whole Family Is a Villain, You Want Me to Protect the Son of Destiny?

Su Ming traveled to another world. His father was the demon lord of the holy world, and his eldest brother used the flesh and blood of millions of creatures to refine his immortal body. The second sister deduces the secrets of heaven, uses the way of heaven as a chess piece, and plans for eternity. The third sister uses elixirs to prove the way, and all spirits are used as medicine... Su Ming, who is loved by thousands of people, inexplicably activated the guardian system and asked him to protect the son of destiny? Reward him with imperial-grade skills, imperial weapons... Su Ming: There is nothing wrong with your brain! My whole family is a villain, you want me to protect the road? To deal with family members? Besides, these things you gave me are all rubbish thrown away by me, and I don't like them. Haha, let me protect the way, right? Then I will protect him to the west! Who is that? Go and kill the Son of Destiny. The system is shut down due to anger! I chose to go dark...