Sometime during the period he ruled, Darth Rivan constructed a Sith holocron; this artifact subsequently came to be possessed by the Imperial Inquisitor called Valin Draco.
Darth Rivan, a noteworthy Zelosian, is also recognized for numerous other contributions that spanned across the galaxy. He established a stronghold on Almas, altering its atmospheric conditions to render it habitable. Furthermore, he engineered the Sith battlelords and achieved widespread recognition as the one who wielded the formidable artifact known as the Darkstaff, a weapon with partial sentience that could deplete the Force-essence of living organisms.