The most common race, Y'tras, composed the 87% of the Shatras population. They were technologically advanced and commonly traveled through spacelanes, having colonies in different worlds.
The Y'tras knew of the Hy'tras race living in Klypash. After a vast, centuries-long war that made the Hy'tras reject technology, the Y'tras made a deal with them: Leaving the Hy'tras alone in exchange of their riches. Both parties respected the agreement.