The Glass Coffin
A tailor's apprentice became lost in a forest. When night came, he saw a light shining and followed it to a hut. An old man lived there and, after the tailor begged, allowed him to stay for the night. In the morning, the tailor awoke to witness a fight between a great stag and a bull. After the stag won, it bounded up to him and carried him off in its antlers. It set him down before a wall of stone and pushed him against a door in it, which then opened. Inside the door, he was told to stand on a stone, which would bring him good fortune. He did so, and it sank down into a great hall, where the voice directed him to look into a glass chest. The chest contained a beautiful maiden, who asked him to open the chest and free her, and he did so.
The maiden told him her story: She was the daughter of a rich count, and after the death of her parents, she had been raised by her brother. One day, a traveler stayed the night and used magic to get to her in the night, to ask her to marry him. She found the use of magic repellent and rejected his proposal. In revenge the magician then turned her brother into the stag, imprisoned her in the glass chest (coffin), and enchanted all the lands around them.
The tailor and the maiden emerged from the enchanted hall and found that the stag had been transformed back into her brother. The bull he had killed had been the magician. The tailor and the maiden then married.