Hi, this is a great thread to add to for commentary on the way spells work in general, but for specific uses of spells or bugs then it's probably best to create a separate thread in either the Technical & Gameplay Problems subforum. Note that's to discuss potential bugs and workarounds with other forum members, as the way to report bugs to Larian is via their support website. The Report a Bug link up along the top of the game launcher will take you to the right place.
"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"