>>713322693There are plenty of ways to hurt Superman, even without the various forms of Kryptonite
>Red Sun Energy will weaken him to normal human level>High voltage electrical attacks hurt him due to his nervous system>Sensory overload such as light and sound can disorient or even harm him >Like most people, Superman has no natural defenses against magic items or magic spells>Susceptible to psychic mind control or mental based attacks>High levels of radiation can harm him and deplete his solar cellsAlso keep in mind that if the tech is advanced enough, be it alien or from the future, it can most certainly harm Superman. Such examples cited would be Brainiac or The Fatal Five