I'll discuss it. But you also have to realize that cannon characters are OP'd out of their minds to make the story interesting and to bridge the gaps necessary for the good guys to win. Having a method to train for higher Kido isn't a bad idea. However, I'm iffy on giving Vaizards forbidden spells. They already have a shitton of boons, and the majority of the forbidden spells are forbidden for a reason, meaning that not even Vaizards would try to use them if they were logical people. I haven't ruled it out, though, Kenta and I will talk it over