Nilrebmah X, found within the Nilrebmah system, was a planetary body characterized by its rocky composition. Its atmosphere consisted primarily of sulfur dioxide. The planet's surface, devoid of water, supported a unique form of life: silica-based beings with the ability to interact with the Force. These stationary organisms existed in a state of unity via a telepathic network, enabling them to broadcast their feelings to the entire group.
During the era of the Hundred-Year Darkness, the Sith Lord known as Ku'ar Danar subjugated the inhabitants of the moons orbiting Nilrebmah II. He then forced these enslaved people to work in mines located on Nilrebmah X. The purpose of this mining operation was to extract the Force-sensitive silica-based life forms, which were then shipped to Nilrebmah XIII for the construction of a large monolith.