<Snipped quote by Vec>
I would also add that you cannot change mass or energy of an object and they must be the same type of item. For example, metal to metal. Stone to stone. Liquid to liquid. You still cannot manipulate seawater. And you cannot manipulate anything organic. So no wood warping or anything like that.
You also need to set a finite limit of how much mass you can do at a single time.
everything you said, I mentioned when I was addressing Bai's questions. Of course, he can't control seawater. As said before, he can only change Solid > solid, liquid > liquid, gas > gas, plasma > plasma. As said also before, he can't change wooden items or change items to wood. As also said before, with the skill of the user varies the speed (how many items at a time) with which the user can change objects as well as the volume, mass and size of the changed object.
The thing with mass is that it will always be changed. Let's say you have Iron right? and you change it to gold. Gold is always heavier than iron so in a sense, you can't jus change an object and NOT also change its mass.
Anyway, I see my idea is causing a lot of arguments. The only other option I really had for him, if this DF didn't work, was the Moku Moku No Mi, Smoker's fruit. But, since you also don't like logias. I'm out of ideas.
I originally wanted to make a swordsman, but then i realized that there are like already 5 other swordsmen on the roster, so i scrapped that idea as well.