A visor of mists

Stats needed.

A visor of mists is an exceedingly rare out of game eyewear item which was carried by the Mist Dragon in Knights of the Round. It is not exceptionally powerful, but it was unique as a warrior-wearable eyewear which granted detect invis, detect hidden, and scry.

One visor of mists was lost by Erdos in a death trap in the Abbatoir Asylum. Another is believed to have been lost by Selina upon ascension to Immortality (unconfirmed). It's uncertain how many remain extant, or whether any do at all.

Can anyone confirm that this item's name was indeed "a visor of mists" and not "a visor of mist"? {stub}