My idea for the elements doesn't stretch that far. I would say that elements could be blended but for healing and such its just a no go. Darkness and Light would be "nonelements" along with spirit or Ki. I could just revise it down and make it just five basic elements that branch out maybe later. But its elements. Darkness formed into a sword or something like that. Same as light. One could also view Darkness as cold and light as heat. So you could do some things with that. The system basic mechanics are. You as a player write up 10 spells that you know based on ONE element. Something you were born with or whatever. These 10 spells are what you get throughout the entire rp(Spells which I will read and either accept or deny them. I would do this because I wouldn't want people to have some kind of godly spell or just make up bs while they are rping. It limits it so that you can make versatile spells. Like having offensive, Defensive and noncombat spells.) It is more restricted but it makes the player really think about the spells at hand and how they can help given different situations.