Complex sentence: Jadis makes Edmund come with her to the Stone Table, but after many miles of travelling her sleigh eventually becomes immovable as the snow melts; it becomes apparent that Aslan has destroyed her magical winter.
Split into simpler sentences: Jadis makes Edmund come with her to the Stone Table, but after many miles of travelling her sleigh eventually becomes immovable as the snow melts. It becomes apparent that Aslan has destroyed her magical winter.