I had an idea for a kind of a Gemstone Kuros.
A parasitic crystal, that infect the Kuronium of an Kuros. It can infect other animals but the Kuros are the most vulnerable.
Maybe you can use it.
OOC : Oooh, this is creative! There aren’t any diseases or parasites yet, so this is really interesting to add to the lore!
Weirdlanders 