((As nobody seems to be interested in interacting with the facility, I'm taking matters into my own hands.))
The Necron Lord of Kronos had been locked away. His immortal soul, bonded to a body of steel, was trapped. He had been probed and measured, as the Tau attempted to quantify and control the power of the C'tan Gods, each of which is omnipotent in it's own right. However, none could truly control, or measure, the soul. And as they had broken apart his body, they had forged a new one, scattered throughout the maze of steel that was the Tau facility. Bits of his own warriors, and his original body, fused with Tau and Eldar technologies. The Necron Lord was practical, if nothing else.
Each of the pieces, seperated physically, lived, and answered the Necron Lord's call. The foolish living had thought him dead, but he was immortal in death. His warriors answered him, and screams filled the facility as each piece of Necron Technology reassemvbled itself, the metal molding into a new, improved form. Gauss flashed alongside plasma weaponry, and the living were soon silenced, brought to peace by death. And when all within the facility had been silenced by the black cloack of the Nightbringer, from the darkness emerged the Necron Lord of Kronos, reborn again. This world would be brought into the silence of death by his very own hand. He could feel that the C'tan Gods had chosen him for this task.