The Summer King

The archfey master of Shae Loralyndar, the Summer King is one of the most well-regarded and powerful fey, and leader of the Summer Court. A towering, regal lord crowned with branches and leaves, he is attended by dozens of close eladrin courtiers, spending his days in revelry and politics.
More than anything else, he is a creature of passion. He is the warmth of summer sun, the long golden afternoon under the trees, the sweat of a day's work in the heat, and the balmy night of celebration. When crossed, he is the rolling summer storm that brings lightning and floods, and when respected he is the shining light that brings growth and wealth.
While the King of Summer has long visited Eberron through his Spire's movements, it's only recently that he has become stuck here. Bound to his court, and therefore bound to the grove of the Twilight Demesne where it is stuck, he has withered. His aspect waning towards autumnal cold, he has grown tired and older. Desperate for his court to be returned, he has sent out his knights - including Cassia Silvercrest - to find a way to return the court to its place in Thelanis.