An unidentified Sith priestess aroused the interest of Remulus Dreypa, a Human male and fallen Jedi, around 6900 BBY. Along with his fellow exiles, Dreypa had discovered the planet of Korriban, inhabited by the Sith species. The aforementioned Sith woman, a member of the priestly Kissai caste, became an object of lust for Dreypa, who feared to see his bloodline die with him. While the Sith and the Humans were normally incompatible, it was discovered that alchemical crossbreeding could still be achieved.