Complex sentence: There the faun confesses that he invited her not out of hospitality, but with the intention of betraying her to the White Witch, who has ruled Narnia for years, using magic to keep it always frozen in winter.
Split into simpler sentences: There the faun confesses that he invited her not out of hospitality, but with the intention of betraying her to the White Witch. She has ruled Narnia for years, using magic to keep it always frozen in winter.