Frankly, I am curious as to what the function and purpose would be to a binding spell. There are love spells, attraction spells, even curses and hexes. All of the latter have a targeted function or purpose, what specifically is a binding and its targeted use?
A binding spell is generally a spell used either to stop things from occurring or to lod them together like thinking something up or alternately tie them together. It is a highly wide variety of spells for a variety of purpose from binding a person's bad habit in order to help them to break it to binding a spirit to a place or object in order tonaid in further magical workings or to bind a failing relationship to keep it from falling apart.