Again, certain runes are mentioned but not described. I like to shine light on my abilities, to avoid the chance of being accused of bullshitting. The 'path' rune isn't explained whatsoever, although it's in virtually every idiom. The 'time' rune, which actually doesn't control time, is required in the idiom that does.

However, this still doesn't change the fact that you could up the anti without ever having said so. Without a clear definition of spells, I can assume you're capable of increasing the maximum amount at will, in secret. Given that we've entered the high tier, but I didn't begin in it, I can assume you've mentally prepared new frontiers for your character's varied magic already.

So, if 'likes evocation' concludes using every elemental spell... the fact 'likes magic' is written in Myron's profile, should give me the option of adding in some new spells to fit climbing a tier, as long as I openly express what they can do. It's also openly stated that there are hundreds of runes, and hundreds of them in his book. He memorized a certain amount, however, upon scrolling through his tome, he may remember these unmentioned runes. In any case, any new spells will not be high tier themselves, any that could be, will be idioms based on the spells he's already listed as having, giving you no reason to deny them. (E.G, A vortex, consisting of gravity sucking everything in to a rift.) If anything I have the same excuse here as you've used; "Everything is in his sheet," albeit vaguely so.