Maybe within the school staff there is someone evil enough. Some huge lore nerd with glasses the size of their head who would be knowledgeable about all the relevant lore. Perhaps a villain who saw the trap boys go eat Mage Seed, when it had all along been his/her conspiracy-esque plan to get the Turtle to walk over to the mage seed tree in the first place. The villain then watched all fruits being gorged down by bunch of losers, unable to go stop them because maybe the villain is really tiny and weak themselves, but good at plotting? He then tries to arrange situations where he could extract the mage seeds out of the boys and sends the whole squad after those dangerous enemies, but the plans are thwarted by Gabriel's spunk working as a remedy to all of it.<br/><br/>I agree the inflation is a bit comedic, but the idea of that minotaur could still work nicely.<br/><br/>I obviously don't mind transformation. We could use stat upgrades and trait bonuses (darkvision and such) as bonuses to gain with or without physical alterations and still keep Gabriel's seed as a potent boon it is. In the end power like that is very easy to balance in encounter design.<br/><br/>Your racial lore sounds nice.<br/><br/>For the magics we could also just let every spell be applied creatively to smut as you see fit. You could probably use heal spells to aid pregnancy, control water to tease your friends and so on.