Jeff's body tingled and initially, it felt good but when his chest began to inflate his whole body recoiled. Jeff identified as male and that fought against the magic tooth and nail.
The magic tried to turn him female but every turn his mind and body resisted. Jeff felt his face resculpt itself, his muscles swelled, his fat reserves burned away and his body lengthen. Something really strange happened to his back.
Jeff was left panting on all fours sweating from the exertion of all that came with the transformation. "Uncle Yohannon, what happened?"
"The first time is always the hardest, child, you seem less feminine than expected, though you are surely beautiful my dear." Yohannon conjured a mirror for Jeff. "This is your default form, your truest self, give or take the blonde."
Jeff's first impression was that he was looking at a blonde winged version of his enhanced (25 and muscular) father but after a few seconds he realized it was himself. A trail of hair went from his pubic area, over his muscled abdomen, exploding over his pectorals. It rose gradually to his face coating it in stubble and his hair eventually cascaded in a waterfall of luscious blond locks falling from his head... Translucent, iridescent wings erupted from Jeffs's back in an array of colors, capturing the light and spreading it in a dazzling rainbow of light. "This wasn't what I expected. I thought I was a woman?"
"Well, you are! Genetically. But as I said it's much, much more complicated than mere genetics." Yohannon responded. "Aren't breast's more pokey outy than this?" he said poking at Jeff's pectoral muscles.
Jeff was beautiful, though still entirely masculine. His life and identity, to this point, was as a male human and he identified with that; separating him from that would cause him harm, and unlike nearly all Peri who suffered gender dysphoria when born male, Jeff was a male Peri. Nearly unheard of except for legend.
"My son the fucking unicorn.." Mike said with a hint of pride and a smirk... "I'll be damned."