Wikipedia
Promethians
The Promethians are a fictional race of aliens featured in the Rifts role-playing game from Palladium Books. They reside in an intergalactic region of space known as the Three Galaxies, which is located in an extradimensional universe. Promethians first appeared in Rifts Dimension Book Two: Phase World, authored by C. J. Carella and published December 1994.