The Shield of Valor is one of the eight talismans of Sir Cabirus, representing the virtue of Valor. Once held by Lord Blackthorn before his temporary ascension to the throne, this shield has the fantastic ability to never break because of the magics woven into it. It is a strong symbol of virtue.
The Shield of Valor was held by the Valor-Golem in the sixth lever of the Abyss in Ultima Underworld I. The Avatar mastered the challenge to defeat it, and got the Shield as a reward. It was cast into the lava of the Abyss later, to banish to Slasher of Veils.