Rokna blue was an extremely potent and deadly narcotic that was extracted from a tree fungus on the forest moon of Endor. The smallest amount—no more than a microgram—brought exquisite bliss which lasted for hours but was otherwise considered fatally poisonous. Another side effect of using "the blue" was memory loss; one Rokna addict, Joreb Goss, could not remember anything from more than a year earlier.
- The Essential Guide to Planets and Moons
- Endor and the Moddell Sector"—Star Wars Gamer 9 "
- Geonosis and the Outer Rim Worlds
- The Essential Atlas