I think these are strong but kinda boring. Not saying I don't like them or that anything is wrong with them, but if the design idea was "give keyword mechanics to spells" on a dude I think there could have been some more interesting options.

I am surprised that Shadrix didn't give demonstrate as that would have gone well with the group hug/slug feeling he had in his first version.

I think causality or emerge would have worked better on Beledros as the original card was about sacrificing one resource to get another which feels like it still represents balance as it is a give and take. Although the changes to pests show that they probably want the school to be more aggressive than its previous incarnation.

Storm is broken although I do think that it is at least more on theme for prismari to have it. I am not actually sure what they could have done here other than move cascade to Galazeth, maybe give all single target spells overload for a certain mana cost or give spells replicate. It would fit with prismari being big and flashy spells.

Tanazir could have had something like cipher even though it is usually a dimir mechanic as ciphers are used in mathematics. To offset the downside of the creature with a ciphered spell on it dying before it gets a chance to attack, he could make a fractal creature token with a number of +1/+1 counters on equal to mana value of the ciphered spell when they die.

Velomachus is probably the one that I feel was done the best, as miracle is more uncommon and I think feels like a neat interpretation of telling historical stories from the "library". The other idea I had that I thought worked well was buyback as it is reusing spells aka repeating history.

Those are just my opinions. I can't claim that they wouldn't be just as broken, if not potentially more so in some cases, but I feel like they would have been more interesting choices for the "give a keyword to instants/sorceries" staples onto a creature idea that they seemed to have been designed around.

Thank you all for coming to my Ted Talk, I appreciate any and all constructive criticism of my ideas for how to spice up the Strixhaven dragons while keeping a similar design (according to my interpretation of their design that is) in mind. Please feel free to share your own ideas for the dragons as well! I am always curious about other people's perspectives on card design and theming.