The Ducal Retainers of Urania who patrol the ever moving Twilight Zone, carry special swords that only they may legally carry.
The hilts are of glowstone and there are glowstones set in the guard, along with a number and name of the Retainer who was issued with it. The glowstones act as a limited light sworce and provide warmth. Not a lot of warmth, just enough to prevent the hand that holds it from getting numb with cold, should the Retainer enter the Darkside for any reason. The iron blades are a foot long. Should an outsider be found with one of these swords, he or she will at the very least be taken in for questioning as to how it came into his or her possession. At worst the outsider could be slain on the spot.