- "Left to guard the tomb serving as the resting place for its master, Marka Ragnos, the beast has dwelled in darkness for centuries. Legend tells that Ragnos beat his pet nightly, warping it with the Force until it was a creature of pure hate and anguish. Starved for unthinkable periods of time and then fed only blood, it is said to be filled with an unquenchable thirst for more. Since the death of its master and its seclusion in the tomb, no one has seen the beast and lived to tell the tale. But the strongest Sith can feel its unnerving presence."
- ―In-game Codex (Bestiary)
A monstrous terentatek was created by Marka Ragnos during his reign as Dark Lord of the Sith.
Despite the fact that Ragnos considered it his pet, the Sithspawn was beaten nightly and given periodically given blood as its sole meal. As such, the terentatek became a manifestation of pure hatred and anger.
Following its master's death, the beast remained in a chamber of Ragnos's tomb, and was one of Korriban's powerful sources of dark side energy.
Driven only by an instinct to kill and defend its master's crypt, the terentatek confronted the acolyte, but was killed in a brutal duel.