The Children of Destiny Are All My Top Demon Guardians!

My name is Gu Suifeng, I have traveled through time, the good news is that I have a system, the bad news is that it has nothing to do with me... Because it can't make me stronger. Fortunately, it was the Son of Destiny who became stronger after completing the mission. If it weren't for the series of question marks that need to be unlocked, I would have run away with the bucket! What? ! You say I rely on other people's trash? ? ? So what's going on! ? If you have anything to say, go talk to my Demon King Protector! If you don't die within one second, you will be killed!