Celestial Steel is the metal that came directly off of the avatar of the Gods during The Celestial War. It is not found naturally anywhere on Altais, but some scraps of it can still be found from the aftermath of the battle.
Celestial Steel has a blue and purple tint to it that shifts around seemingly randomly. Its immense beauty is only matched by its nearly unstoppable power. In fact, the only substance known to be able to cut through it is Draco Steel.
Due to the strength of the steel, only a few people have the skills and tools to craft it. Crafting Celestial Steel requires a full set of Draco Steel tools.