Ghostly Ether

The Ghostly Ether is a location from The Legend of Zelda: Twilight Princess. It is a dream-like plain with Hyrule Castle partially submerged in the distance. It is here that the Hero's Shade resides and teaches Link new Hidden Skills.

After Link finds a Howling Stone and communicates with the Hero's Shade through it, the entity enters the Light World as a Golden Wolf. Once Link meets up with the wolf, the creature transports Link and himself to the Ghostly Ether where he transforms into a heroic, armored skeleton. The Hero's Shade proceeds to teach Link a new Hidden Skill and once he has mastered it, he is transported back to the Light World.