More of a headcanon honestly (thanks megatorchicchic) But I think Marvin is really a magician, great even. But he doesn't believe in magic! So this either means he can't do magic because of that Or (more badass) He does the craziest stuff and is like "nah, that's not magic; magic is something unnatural, impossible. This was always my normal."
xD
a denier of his own powers- especially in action. I (personally) can’t see that with Marvin, but that sounds like a really funny trope overall!








