Corrected some errors and added some new things

corrected some minor mistakes and stremlined some of the terms

added a new feature suggested by the user TheGiftOfGabes , though i made it optional; i like it and it can be pretty useful, but i prefere to higlight it as an optional feature in case the caoticness of the system feels too high, either as a default or as an ability granted by something. 

also, just for fun, i added more  equipment examples with different effect that revolve around giving more or less agency to casting, or just spice things up a little.