Ethereal (Khaal)

The Ethereals were one of the main races that appear in Khaal: The Chronicles of A Galactic Emperor.

Physiology
The Ethereals resemble gray skinned tailed humanoids. One of their remarkable traits is the ability to phase through inanimate objects. In addition they are immune to psychic incursions.

History
The Ethereals were one of the three main races that were imprisoned on the ancient prison ship E.T.H.E.R. They faced near annihilation by the mad warlord Khaal the Executioneer, forcing the Ethereals to forge an alliance with the Psycogs.