A room built from transparisteel was located aboard the Gaze Electric, a ship that belonged to the pirate leader Marda Ro. Although she suspected it was meant to have been used for medical observation, by around 379 BBY she used it to cage a beast known as the Great Leveler. Around that year, she brought a Jedi to the room to allow the Leveler to feed on him. Ro later mentioned the room in a message she recorded for her descendants. By 252 BBY, her great-great-grandson Marchion Ro had listened to Ro's journal, including the message in which the room was mentioned.
The room was located on the Gaze Electric, a starship that belonged to Marda Ro—the Evereni founder of a group of pirates who would eventually become the Nihil. It was built from transparisteel and Ro speculated that the room was intended for medical observation. The Gaze Electric had a containment shield that could isolate the room from the rest of the ship.
The Great Leveler (pictured) lived inside the room.
By around 379 BBY, the Great Leveler—a creature that fed on the Living Force—was caged in the room behind a containment shield that prevented it from leaving. Around that year, Ro captured a Jedi and had her underlings Rox and Milan Stor bring him to the room. Rox dropped the Jedi outside of the containment shield which Ro deactivated to allow the Leveler to consume him. She then watched as the Leveler turned the Jedi into a stone-like husk; however, Rox, Stor, and her assistant Alirya looked away and did not watch the whole process. Afterward, Ro ushered the Leveler back into the room and strode away towards her throne hall.
She later mentioned the room in a message she recorded for her descendants. By 252 BBY, during his youth, Ro's great-great-grandson Marchion Ro had listened to her journal, including the message where the the medical observation room was mentioned.
The room appeared in a flashback in the short story "A Closed Fist Has No Claws," written by Tessa Gratton and published in the 2023 young-adult anthology The High Republic: Tales of Light and Life as a part of the Star Wars: The High Republic multimedia project.