The battle with Arawn was a long time coming, and a long time ending.
Not just Caer Colur, but Mona and much of the coastline, sank permanently beneath the waves.
But at the end, the last enchantress of Llyr stood supreme, the most powerful wielder of magic who had ever walked the earth, and the secrets Arawn stole from humanity had been saved from his burning treasure hoard.
But before the magic finally left Prydain, there was one last spell to cast.