User blog comment:Fairy Tail Grand Master/What is the hidden blade made of?/@comment-5062544-20120630234522/@comment-1888015-20120701000459

No, the Hidden Blades were never an artifact of the First Civilization.

Altair's upgrades to the Hidden Blades were made because the Apple of Eden that he wielded gave him the information that he needed to create them, which led to him drawing up schematics for the upgrades in his Codex.

However, the Hidden Blades were man-made.