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 original Apple II version of Ultima IV, Shamino stands directly to the west of the Ankh, thus the Stranger can only communicate with it after Shamino has joined the Stranger's party. Since Shamino will not join the party of a person who is himself a Ranger, this means that Ranger-Strangers have only decidedly non-virtuous methods available to get to talk to the Ankh: An attack on one of the peaceful people surrounding it, followed either by flight or murder. To prevent this predicament, Shamino was moved one square away from the Ankh in the later ports of Ultima IV (as seen in the image above, which has the player stand between Shamino and the Ankh).
 * In the alleged journal of the Avatar discovered by historians Robert DeMain and Carlotta Stein, the Ankh of Spirituality is described as being made out of smooth marble. The Stranger claims that it communicates directly with their mind upon the recitation of the mantra - sending them foreign thoughts that reverberated through their mind.
 * 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.