Ankh of Spirituality

The Ankh of Spirituality is sapient silver ankh which could be found by the main entrance to Skara Brae during Ultima IV.

Description
The Ankh of Spirituality had knowledge of both the rune and the shrine of its signature  virtue, but would only divulge information regarding them if whomever addressed it knew and could repeat the mantra of Spirituality. The Stranger, having learned the appropriate syllable from the child, Barren, could placate from the Ankh accordingly, and would be told that the rune lay in the treasury chamber of Castle Britannia, and that to reach the Shrine, the hero would have to enter a gate when both moons were full.

Trivia

 * In the Nintendo port of Ultima IV, this construct gives its name as 'Silverspirit," and will freely give knowledge as to how to reach the Shrine of Spirituality, as mantras do not feature in this version of the game.