The City Inevitable
A world’s Feyside (or Feywild) is the reflection of the world that occurs at the point where it connects to the Gossamer Web. It is a beautiful and ideal reflection of the world, detailing the original intended path of progress for a world seed as it grows. In addition to serving as a sort of blueprint, it also exists as a sort of umbilicus that allows the Great Seed’s energy to be absorbed by the world. Without a Feyside, a world will wither and die, with no hope for growth or the development of life.
When a world withers and dies, all beings of fey origin that exist as manifestations of the seed’s energy rather than as manifestations of the world’s use of that energy return to the seed. This includes many kinds of fey, such as the sidhe. The Seelie Court claim to represent these kinds of fey.