what do you prefer to be used in spells? things from a certain world, or things unique to a school? for example, what if the new life minion would not had been a creature from avalon, but instead was a life creature, such as a treant or forest lord?
I personally prefer themes--certain spells from Spiral locations just don't make any sense to me. What does a Spinosaurus have to do with Life? What does a Calendar have to do with Myth? That's just confusing in my opinion, but I don't see these getting changed. At least they are professionally well-made and fun to watch.
However, if I had my way...
Why not use some kind of prehistoric tree spirit for life, since life already has two tree spells?
Why not incorporate some Aztec mythology for myth? Quetzalcoatl would have been an easy spell choice (god on which the Quetzal serpents were based, but I guess Fire stole that one).
Why not have a Storm Tlaloc spell (Aztec god of storm)? What do owls have to do with Storm magic, or the world of Azteca? Nothing at all.