King Minwan has observed that the torc will make him unnaturally cold, even on the hottest days on the savanna. This is one power of the device, but isn't it's true purpose. Minwan does not like to wear the torc as a crown due to this property, he is often seen fidgeting with it. On particularly hot days he uses it as a reward, passing it from kobold to kobold so they may gain relief from the heat. This closer to the device's true purpose.
Before the Empire came with it's roads and supply lines, the indigenous half-elves created many of these devices to support their construction efforts. Each crew was 11 workers under a supervisor. The supervisor was identified by his torc, a mark of office. As he gave out assignments, the workers would tap the torc on his arm. This conveyed 4 hours of immunity to the sunburn and proofed them against the heat. When the work was fully completed, the supervisor would often bury his torc as an offering. The kobold's digging in the Folly uncovered the device that is now known as The King's Cold.
There are variants which protect against cold as well as heat.
This item first appeared in The Kobold's Folly, which is a series of maps available on DriveThruRPG.
The Kobold's Folly is one of the first mini-settings I created, initially hand drawn but then spiced up with Worldographer.
These two images comprise the 3rd floor and has a scale of 1" equals 5 feet. The whole set of maps, interior and exterior are in this scale so you can print your own battlemat.
This set of maps are ruleset agnostic, meaning you could use them for D&D just as much as Traveller.
This tribe of Kobolds takes care of horses. They almost worship them and some are quiet special. In my campaign, they have two beasts which are unique to the area and are rarely seen by outsiders.
Yes, they have mechanical horses. These creatures are not described in the book Kobold's Folly, only here as an addendum to my campaign information to show how adaptable these maps really are. While this is meant to be a low danger setting, it could be cranked up to any level the game master requires. It only takes a little imagination.