Page "The Bard's Tale (1985 video game)" Paragraph 26

# If they possess the eye, a statue of the Mad God in Baron Harkyn's Castle ( 3 levels ) will teleport the party to the ( otherwise inaccessible ) northeastern area where the next dungeon is located ; however, it is not required to proceed to the next dungeon immediately.

If weakened too much from the fighting in the castle, the party may elect to leave the area via one-way portals instead at this point to return to the city and the Adventurer's Guild.