How to Obtain
- Trial 3582: Obtain 5 vials of Umbral Marrow
Originally wielded during the Shadowreign era by Kayeel-Payeel.
In Latin, a claustrum refers to an "enclosed space" or a "barrier". In medicine, it is a thin layer of grey matter within the brain. Its function is not completely known, but it is theorized to be a key component of consciousness.