Crown of Maze Navigation

While on the 7th level of the Abyss in Ultima Underworld I, the Avatar learned that the evil Mage, Tyball, had erected a deadly maze, which was the only way to his lair. The maze was sadistic in that only one path would be safe, and stepping away from it would suck out the lifeforce of the unwary.

The Avatar had also heard of a countermeasure, and found the Crown of Maze Navigation amongst the treasures of an Imp. Wearing this crown, the normally invisible path became visible and allowed safe passage of the maze.

Trivia

 * The crown in question stands out as the only one with a white gem in the front.