The Fey have long held great power in Avalon. In days of old, the lords and ladies of the Land paid homage to the Fey and it was they who anointed the reign of the High King. This changed when the demon lord Corwin came to Avalon and slew the High King and his family. He drove the Fey from the land with his terrible blade which they greatly feared. Some claim that Corwin was allied with the Unseelie Winter Court.
For three centuries the power of the Fey was diminished in Avalon. Corwin's power blocked their return. Still, the Fey sent champions to Avalon to prepare for their return. One was said to be the Lady Siofra. Another Paramurd of Deval who briefly reigned as High King when Corwin at last was destroyed.
In Corwin's absence, the Fey have returned to Avalon. Now, the Fey walk the Land and do as they will. Since Corwin's fall, the Unseelie Winter Court has held greater power over the Land than the Seelie Summer Court.