Capítulo 124: 124. Burning Dreams 

"T-This is… a Skygem!" Sylvester exclaimed. He had read about this when he was reading about the most precious items in the world. This was one of the top items there.

Skygem was one of the strongest metallic materials known in the world, with magical properties to be highly durable and in harmony with magic. It was the best thing one could build armor out of, and supposedly, there were just five full-body armors made of Skygems in the entire Sol. But, sadly, throughout history, all five armors have been stolen, divided, and lost, so no single full armor exists. 

Not only that, even if one finds many new Skygems now, one can never make armor because this knowledge resides with Dwarves of Beastaria only. Since it's an ancient gatekept art, it's impossible to find and enslave dwarves who know how to work on it as they don't travel. And those enslaved dwarves who knew, had long passed away.