I've heard of it, though right now the uses of it aren't used within the human body from where I'm from.
[ Elfnein had certainly used it before when upgrading the symphogear relics and when crafting other items, but it was still far from being implanted directly into humans. ]
no subject
[ Elfnein had certainly used it before when upgrading the symphogear relics and when crafting other items, but it was still far from being implanted directly into humans. ]