Did your people use some sort of magic to melt Kuronium? Or was it something that only needed high temperatures?

Lost Queen : Your first guess was correct, actually. Dark magic and unique malevolent fire of some sort (like shadow fire, aura fire…there’s lots of different types of fire) was traditionally used to hone Kuronium. The smithing done in Kurosia was the best, most advanced forms of this, as we had the blacksmiths (that often doubled as priests and priestesses for Wunjabrot, our blacksmithing god) that could sing the prayers needed for Wunjabrot to bless the metal, making it powerful and the most magical. It’s still possible to smelt our metal other ways, but it’s often not as strong as Wunjin-honed Kuronium. The metals I have now aren’t as strong as they once were, as Wunjabrot is… silent, like most of the other Gods.