Is There a Weapon That Can Destroy Dimensions?

An advanced civilization set off a dimensional weapon to collapse space time. Is it possible or would it maybe require an infinite amount of energy to just get rid of a dimension? We're early days, but with our current understanding, that seems pretty flat out impossible. No amount of mass or energy can change the fundamental shape of the universe or the number of its dimensions. But technically you could do that, right? You just wouldn't trap it to move in two d. And there some fun systems where, like, electrons are trapped into a plane, and they move around in new weird ways,. following two d quanta mechanics which's pretty interesting.