Just prior to the First Great Diffusion the Underground Liberation Party was a primary enemy of an evil antagonist. Knowing the antagonist's distaste for the word "YOBIB", they graffitied the word in large letters in an underground city (which had a complex structure of caverns and passages) that could only be read from above (as was the view the evil antagonist would see in his crystal ball). In response, the evil antagonist destroyed and sunk the majority of the large area of land from this city into the Great Misty Sea. This area is today known as the Cliffs of Depression.

SOURCE(S): Return to Zork (design documents)