Thelanis

Thelanis, The Faerie Court is one of the Planes of Eberron.

Thelanis is one expansive lush forest, with trees of enchanting beauty surrounded by mesmerizing lights. Phosphorescence gleams on plants and stones, lighting the eternal twilight of the plane, while the sky is full of strange stars. Every day in Thelanis equals a week on the Material Plane, this time catches up to any person traveling back to the Material Plane. If one spends too much time on Thelanis, moving back to Eberron might suddenly kill the person of old age.