Unluckily for Donatello, Mildmay lives to make things awkward. And talking about magic is not actually a great way to unawkwardify him. He shakes his head, "fuck, no. I steered the hell clear of that shit." He shakes his head. If he were in a better mood, he'd note that magic doesn't make things interesting or fun or cute, but Mildmay is too embarrassed right now to give a shit about what other people think. Obviously everyone already hates him. Why waste the effort?