Undine Silicia is one of the confirmed artifacts that has made itself know during the field tests that have occured so far.Undine Silicia is something we, in Operation Essex, are not familiar with. It required some digging to figure out what it may be.
Paracelsus placed undine in a category of imaginary elemental beings associated with water. Water nymphs or mermaids. Paracelsus declared them beings without a soul. "Although resembling humans in form, they lack a human soul, so to achieve mortality they must acquire one by marrying a human"
Silicia was an ancient Roman name but it's root, silex, refers to flint. And this makes sense because Silica is a hard, unreactive, colorless compound which occurs as the mineral quartz and as a principal constituent of sandstone and other rocks.
So this all brings two thoughts.
- that undine silicia is a stone, possibly flint, that can cature a soul, or simulacra and
- that an undine married into the Silica family
Now it is possible to combine the two. that an undine married into the Silica family and that the soul she was given was held within a flint stone until she was ready for it. And if that is what this is, it could be something that Nemesis can use against the researchers. Capture their souls and prevent their returns.
Now this is just my theory.