A/N: Need I even say it? 'The Frog Prince,' naturally.
The Bat Wizard
There was once a young noble drow maiden who liked to sit on the roof of her family home to clean her jewellery. While she was polishing her Ring of Protection one day, it slipped from her fingers and fell down the side of the house. It landed on a ledge full of spider-webs.
Then the drow maiden was upset, because she needed that ring, and yet if she tried to reach it, she would disturb the webs and thereby anger the Spider Goddess.
A tiny voice spoke up from nearby. "Lady, if you promise to fill my requests after, I will get your ring." It was a little bat. "I can fly to it and bring it back to you without disturbing the webs."
"All right," she agreed. "I promise to fill your requests after, if they bring no harm to me." For she wanted that ring, but knew far better than to promise without any limitations to some unknown creature.
The bat flew down, and brought her back her ring. She took it and hurried inside, gathering up her other jewellery as she went.
That night, the bat fluttered around the house at dinner. "Let me in as you promised!" it called.
Her mother asked her why a bat was saying such things, and she explained.
"A speaking bat is a thing of magic. Keep your promise," her mother commanded of her... though partly, it must be said, because her daughter needed to learn her place and tending an animal might assist there.
Reluctantly, the drow maiden let the bat in. It requested a place beside her and food from her plate, and she gave it these things.
When her meal was over, she left the table, wishing to go to bed and trance.
"Give me a place upon your pillow," the bat requested.
Her eyes narrowed, but she set the bat down upon the pillow. Then, with no witnesses, she stabbed it, planning to tell her mother it had flown away.
There was a flash of light, and a very handsome drow wizard now lay upon her bed, alive and unharmed.
"Thank you," he told her. "I was cursed into bat form by a rival. You've finally set me free."
"Well then," she announced, "that means you owe me now, not the other way around."
With his help, she took over as Matron Mother of her House. He became her consort, and together they killed his old rival. With their cunning and their powers, they killed any who opposed them, and became powerful in the city.