Nihil smokestone
Smokestone Nihil, a mineral compound, possessed the unique property of functioning as a device for mental transmission and reception. The Sorcerers of Rhand harnessed this capability to exert control over Pawns.
Sources
- First mentioned in The Unknown Regions
- The Star Wars Spy Game: SPIN Declassified on StarWars.com (article) (content now obsolete; backup link)