>>691534Jack Vance's Lyonesse trilogy.
Murgen, the most powerful magician of his age, issues an edict: no magician will consort with kings or interfere with political matters. of course, one of them does..
come for the magician who divides himself into two people and an evil green pearl, and stay for the fairy bondage:
"And then there was Twisk, who usually appeared as an orange-haired maiden wearing a gown of gray gauze. One day while wading in the shallows of Tilhilvelly Pond, she was surprised by the troll Mangeon. He seized her about the waist, carried her to the bank, ripped away the gray gauze gown and prepared to make an erotic junction. At the sight of his priapic instrument, which was grotesquely large and covered with warts, Twisk became frantic with fear. By dint of jerks, twists and contortions she foiled the best efforts of the sweating Mangeon. But her strength waned and Mangeon's weight began to grow oppressive. She tried to protect herself with magic, but in her excitement she could remember only a spell used to relieve dropsy in farm animals, which, lacking better, she uttered, and it proved efficacious. Mangeon's massive organ shriveled to the size of a small acorn and became lost in the folds of his great gray belly.
Mangeon uttered a scream of dismay, but Twisk showed no remorse. Mangeon cried out in fury: "Vixen, you have done me a double mischief, and you shall do appropriate penance."
He took her to a road which skirted the forest. At a crossroads he fashioned a kind of pillory and affixed her to this construction. Over her head he posted a sign: DO WHAT YOU WILL WITH ME and stood back. "Here you stay until three passersby, be they dolts, lickpennies or great earls, have their way with you, and that is the spell I invoke upon you, so that in the future you may choose to be more accommodating to those who accost you beside Tilhilvelly Pond."