Shadow and Substance
The Terrible Trivium
You unlock this door with the key of imagination.
Beyond it is another dimension:
a dimension of sound,
a dimension of sight,
a dimension of mind.
You're moving into a land of both shadow and substance, of things and ideas.
You've just crossed over into... the Twilight Zone.
This is only related to the Twilight Zone by the fact that it's kind of odd/unusual. Please judge it based on the avatar not the description.