After some thought, Nate spoke again. "I've got it. I wish to be a werewolf!"
Light danced on the ends of Persis's fingertips. "I can grant that wish, but I would ask you be specific. There are many stories of werewolves, across the world in various ages, with so many differences in what causes their changes, how thorough their changes are, if they can be cured, if it's something one would even want to be cured of, if they are always hostile... I could go on."
"Oh, right." He paused for a moment, then spoke again. "I wish to become a werewolf, a person that can turn into a wolf-man at will, can spread the change by biting, and is forced to change during nights of the full moon."
Persis blinked. She had not expected that last part. "Are you... certain about that last part? It could prove very inconvenient."
"What's life without a little challenge? I like to have at least a little bit of the traditional stuff in there." He waved dismissively. "Besides, I don't work nights."
"If you are certain..."
Persis's hands shimmered, and Nate's body followed, glowing softly for about a minute.
"Your wish is granted."
Nate looked over himself. "That's it? But I didn't feel anything."
"You must will yourself into your new shape, first."
"Oh, right."
Nate focused on his idealized form, and felt black hair growing out in patches all over his skin. He groaned as he felt his feet arching up into a digitgrade stance, one of his toes shifted back into a dewclaw, while the others became round paws. Protective leathery pads grew underneath his feet, while claws forced their way out of his toes. He shuffled around, adjusting himself to the sudden change, bracing himself on a nearby chair.
His hands grew similar pads and claws, though kept their human shape. He carefully flexed and observed them. His breathing became heavy as his body grew larger, his already large muscles swelling further. Nate growled as he felt his jaws stretching out, teeth sharpening, while his nose turned black and wet, the scents all around him picking up in intensity. His ears bent into triangular shapes, and moved up the sides of his head, distant sounds becoming clearer.
"This is... so intense!"
His eyes turned bright yellow as the change drew closer to its end. He hastily forced off his pants as he felt the start of his tail growing out, the long thin appendage getting rapidly covered in the same black fur.
He let out a howl as the change finished.
"That was... awesome!" He panted. "I feel... powerful... wild!"
Persis couldn't help but grin. Fate seemed to be quite kind to her today, not only granting her own wish, but giving her a master that would let her indulge in the sort of transformative wishes she loved. She didn't imagine she'd get to grant many like these, given most of the population would likely wish for practical things first, or simply be fine with their bodies as they were. Not everyone would be like her friends in the furry community, willing to spend absurd amounts of money just to get a drawing or a suit in the image of their ideal self.
She thought of her friends. She didn't regret her wish, but it dawned on her that they'd probably wonder where she was. She shrugged. She'd focus on granting her current Master's last wish for now, and if it opened up an opportunity to contact them, she'd make use of it.
Then again, with this being his last wish, she realized it would probably be good to push him toward something that would help him long-term, in some way.
"Will my master make use of his final wish right away? Or would he like more time to put the result of his previous wishes to use while he considers it?"