The Fey Forest is a direct result of Fearne Twolips' ineptitude and ignorance of fey and arcane magic. After accidentally portaling into The Sliver, Fearne realized that she'd developed no plan for how to return. In an off-the-cuff attempt, she began stringing together magical phrases and incantations she'd heard over the years from the mages of The Seelie Court in the Feywild. What resulted was an explosion of Feywild arcane energy that transformed a portion of the Glynndarrylian Forest into an expression of the Feywild.
The Fey Forest has been the setting for:
The "Of Fearne and Fey"
The Muchroom
Artifact: The Seelie and Unseelie Mirror