TG gun after all

"I wish to have a gun that I can use to change someone's sex, or even change just a part of them. I wish there's a setting so I can change clothes or not, and a setting to change reality or not--if I change reality only me and Karyn remember what happened." "That's the TG gun, right?" "Yeah. This morning I wished I knew some of the things the stone has done in the past. For some reason the stone does a lot of sex changes, so I decided to go with the flow and make a sex change gun." "So what do you want to do with it? Just go around and zap random people? Wouldn't that be dangerous?" "Well, I'm going to try it on..."