"...Honestly? I've grown to like granting wishes. Just not the part where I'm forced to, and can't control where I go. But here and now, the one who did this to me... So far away, his craft stiff and inflexible. I've come to feel out all its limits and dimensions. I think... If you'll allow it..."
He holds out a complicated, multi-layered concept in prayer: The shape of his curse, inferred from experience but unable to be touched from the inside. The mighty reality-altering rush of a wish, with a bare smidgen of divine power applied at just the right angle - snapping the bones of the curse in such a way that it is still technically there but no longer limiting except that he must grant others' wishes, not his own. He would give up much of his power, but inhabit that new form, and get to choose his bearers, and choose whether to grant their wishes.
Also in the prayer, not entirely intentionally- Desperate hope and the yawning, breathless excited fear that comes with being on a precipice. Wondering whether he dares ask for this and immediately answering himself that - Yes he does. After all, it's freedom he wants. It's the ability to make choices. So he is making this choice, to ask for slightly more.