I just created a skill that only my sovern had by editing his player file  this dose however create the small problem of your children enhit this trait so they will generate mana as well .... for me this isent a problem as I mostly just use it for lols and testing stuff

 I think that works I am not used to useing forums often lol sory if its messy or put into the forum wrong but thats what I used and I just attached it to my mod skills file

just remember to set the mana value to what you want it to be ... I am sure if I played with it more I could get more done with this but I been working on a difernt project lately lol