Kryptonian black box
From Smallville Wiki
The Kryptonian black box was a box made by Kryptonians and the hard drive of the Brain Interactive Construct (Brainiac). The device resided within the Black Ship until it was removed by General Zod. It played a major role in his master plan to turn the Earth into a newer version of Krypton. The Kryptonian black box was able to remove the fatal computer virus that Milton Fine had released before in order to wreak havoc all over the world (see Dark Thursday).
Luckily, Clark Kent managed to split the Kryptonian black box in two pieces with his heat vision. Lex Luthor found one part of the box and it was examined by Dr. Groll who quickly realized how dangerous the device was. It is unknown what happened to the rest of the Kryptonian black box. However, Lex's fragment held a huge amount of energy until it was recently absorbed by Baern and a pile of ashes was the only thing left. It empowered Baern to break Raya's forcefield and subsequently kill her. Baern's power was absorbed into Clark's Crystal of El, and used to power up the Fortress of Solitude.
A year later, the ashes evolved into the liquid form of Brainiac as part of Project Scion. The liquid infected Casey Brock, a lab tech studying the liquid. The liquid form eventually evolved into Brainiac's human form, a.k.a Milton Fine. A few month later, Brainiac was destroyed by Clark Kent.
It remains to be seen if Brainiac's essence also resides within the second part of the Kryptonian black box.
