music discs and the return of armor molds

Everyone knows that new discs are always a fresh incentive to explore a region, and that armor templates disappeared after the "Trick Trials" event. My idea is for the Ice Cave to get a new, ice- and Christmas-themed disc, along with a new armor template, to encourage exploration. The Sulfur Cave could also have its own armor template—since few people go there, given that its resources are somewhat limited—and I’d like to ensure that the same thing doesn’t happen to the Ice Cave.