I want to make a freeze ray that I can attach to my arm, and mount on an insulated glove. On my other hand I would have a heat ray, which I have figured out the mechanics for.
Would I be able to spray a certain powder/liquid and cold water from two different tubes, at the right angle to create ice in midair? I was thinking powdered ammonium nitrate but idk if that would react fast enough for ice to form almost instantaneously.