The Storm King and Dragon Queen's War
The Nightstone is a black boulder, etched in indecipherable runes. When the light of Selune falls upon it, the Nightstone glows with thousands of pinpoints of light which resemble the stars on a clear night sky. Sages, Wizards, Priests and learned people from throughout the Sword Coast come to study the Nightstone and its runes. Theories abound regarding the power of the Nightstone, and it's origins, and the meaning of the runes, but thus far, no speculation has been confirmed.