Tzncrom
From BelegarthWiki
Tzncroms are the information storage devices used by Deep Ones to pass down knowledge. Tzncroms are often blue-green-black rocks of impossible angles and shapes. The writings on the occasionally glow with irradescent rainbows of light. Tzncroms are not read as other writings are, rather they are lived as memories and emotions that were instilled upon the tzncrom by the writer.
Known Tzncroms