The Toad Prince was an Ofieriprince who'd been cursed by Olgierd von Everec out of anger when the parents of his love, Iris, intended to hand over her hand in marriage to the visiting prince. The cursed being then took to living in the Oxenfurt sewers, where its venom seeped into the city's waters, making many sick. Eventually, long after the cursed was placed, Olgierd decided to end the prince's suffering, but instead of having someone try and lift the curse, he hired people to try and kill it, resulting in Geralt unknowingly killing the Ofieri prince.
The girl walked up to the edge of the pond. There, squatting amidst the fragrant lilies and broad lily-pads, she saw a most unusual sight: a small green frog with a golden crown perched on its warty head. Charmed by this curious little creature, the girl picked it up and gave it a kiss. Immediately the little frog transformed into a handsome prince. Overcome with gratitude, he asked the girl to be his wife. – folk tale, author unknown
Timeless tales always carry within them a grain of truth. The legend of the frog prince is no exception, or at least that's what the folk of Oxenfurt wished to believe when they found out a monstrous toad lurked in their city sewers. The women who hunted it in search of romance and a better life, however, found their tales had a most unhappy ending. The creature they encountered was no small, sweet frog but a bloodthirsty beast, who not only did not let them in for a kiss, but instead greedily devoured them and anything else that strayed into its slime-covered lair.