[@Kero]Typically I take things on a case by case basis, so it's not so much that certain attributes would be banned, but rather that I'll do my best to properly critique every submission until I feel satisfied that it's fair. In the case of dual attributes, however, the circumstances that allow those to happen in the first place are either impossibly rare or utterly inhumane, so to those I [i]will[/i] give a hard "no."

For Key Magic, I've seen the movie and I'm looking through it on the Wiki right now. Since it does specify that the "grimoire lock" only works on those weaker than the user, and there are some other caveats to its usage, I'd be willing to take a look at a character draft for it. Just be aware that I'd probably be a little stricter on the spell list and whatnot for it.