Spear

"I hunted the Spear during the Stark Hyperspace War, sixty years ago. In any case, once I caught wind of the Spear, I consulted the holocron of Vulta Daanat, former apprentice of Lord Kaan. Daanat and Kaan knew of the Spear, but could only speculate about its origins. Daanat later split with the Sith because he believed the Force was best used for understanding the universe. One major impetus to his path of curiosity was, in truth, his speculation about the Spear. Since then, as you say, various groups have tried to predict the Spear's next appearance, combed its previous locations..."

- Velok

The Spear, which is the most common name for the artifact, is a powerful Force weapon that has been imbued with a high concentration of Force energy. The energy itself is neither of the "Light side" or the "Dark side" but is merely available to be manipulated by the user. Thus the weapon does not fall under any one particular side.

Origin
The exact origin of the Spear is unknown. There are a wide number of different tales that go along with talk of it and how it was created. But all of the stories are variations upon the same theme. As the story goes, the Spear was created in a system in the Deep Core. The system itself, lost to time, was assembled much like the Corellian System by the Celestials. A powerful group of Force users went to the system and were lords there. For many decades there was peace. One of the leaders of the group was cast out during another member's bid for power. This one, one of their most powerful left, with the intent of returning one day to rejoin the group.

This new leadership started to act in ways that were different from the traditions that had been set down. Eventually, the various species of the system revolted against their masters. In the process of subduing the revolution, the Force users caused the system's star to start a countdown to supernova. There was no time to evacuate, and all of the life in the system was wiped out when the sun went supernova. More time passed, with close to a trillion people's life energy and Force energy hanging in limbo due to the Force techniques that the group had done that had caused the supernova in the first place.

Years later, the one who had been cast out returned to find the system completely destroyed. He had sensed the utter destruction through the Force and had come back to the system, now a wound in the Force. This one could sense all of the pain and suffering that had happened and knew that he had to do something. But he had been the group's most experienced alchemist. So he did what he knew how to do.

One of the planets in the system had only been partially destroyed and using that place as a base of operations, he delved deep into the core of the planet, still molten, still hot. He took elements from the core and manipulated them with great dexterity. Forming a spear out of the molten metal, he began a process that would take many months, close to two years. The Force user channeled all of the latent Force energy from that wound in the Force, all of those lives and their Force energy into this Spear. With all of the energy contained within the Spear, the wound in the Force was able to close, and be solved.