Someone tell me wtf is going on idk what’s happening in this manga anymore

Right now, after Sid betrayed Cain, Sid got an offer from the satan , and does not believe Cain will win the war the doctor is trying to remove the weapon from heaven inside Cain’s heart. They are using the uke as a power source. By taking out the weapon from heaven, Cain will be able to restore his powers easier, so that he can survive the attack from Sid.