Like... I'm not even sure exactly how it would work. What I'm kind of thinking about is this:
-You go to your skills section, and let's say there's a skill called "move." If you use and you're right next to a movable object (like a pillar or a rock or something), then you can press a directional key and the object will move that direction one square.
-There's a skill named "grow." If you use it in front of a plant or a vine, then the sprite changes to a larger plant/vine.
-Or you could freeze water, or burn flammable things.
-That's pretty much what I'm thinking of, at least so far. Well, some other ideas I've had are a script that changes it from day to night and vice versa (which is pretty easy with just a switch), and a spell that lets you temporarily see hidden things, but that's not too hard, either.
I know there's a way to do all of these things with eventing, but the only way I can think of doing it would be kind of pain depending on how often I want the player to have to use them. Is it even worth it, though, to make a script for something like this? I have no scripting experience with RPG Maker, so I don't really know at all.