You don’t call a god, even a minor god, lightly. You don’t ask for something it doesn’t want to give. And, there’s always a price, and that price could be out of all reasonable proportion to the favor.
Riolanna wanted beauty. All of the village boys thought her quite so already, but she wanted the kind of looks that launch ships, whatever that means. So she bought a lamb, and cut it’s throat at the edge of the pond where we honor Iop.
No one heard the conversation or saw him turn her into marble. But, I’ll admit: she’s prettier.