Kiira N'Vaelahr

The kiira N'Vaelahr were 24 gems were used by the undercover agents of the N'Vaelahr before the fall of Myth Drannor. They stored memories and magic like a regular kiira, but also facilitated mental communication.

History
In 1374 DR, Khelben "Blackstaff" Arunsun attached a stone like this to the forehead of Tsarra Chaadren to avoid her mind being overloaded by his thoughts after the pair became linked during a magical explosion.