I'm considering a Savage Worlds game where all the PCs are magicians of some type. I'm considering of going with an elemental theme where each player specializes in a specific element (fire/ice/wind/etc). A lot of the powers listed in the core rulebook don't fit the theme of the game, and there are a lot of conceptual powers missing... but I want to allow the players the opportunity to be imaginative and create their own power suite. Is it an acceptable practice to make the players develop their own Powers, instead of creating dozens of new ones myself?