This thing looked like a person's hand bones. The fingers and joints were all there. It was not made of bone however, but rather a black crystal.
Han became very excited, because he had already absorbed two pieces, one Heart of Darkness, and another Genu of Darkness.
"Could this be the Hand of Darkness? The third one of the Dark Celestial King's Set of Seven?" Han mumbled to himself in excitement.
He quickly turned to Sha Emperor's daily log and found the relevant content.
It turned out this this was really the Hand of Darkness, and it was something Sha Emperor obtained while traveling through the Memphis galaxy. It is said that two dark crystals appeared in the Memphis Galaxy, and Sha Emperor killed many people to get the Hand of Darkness.
The Heart of Darkness allowed Han's right eye to activate the special dark vision, and gave Han the power of darkness in his attacks. On the other hand, the Genu of Darkness enhanced Han's speed and stamina.