Zor-El was featured in issue #16 as he appeared as an apparition and explained what truly happened to Kara, and why she was sent to Earth to kill Kal-El, in a dream sequence. Zor-El was against the use of the Phantom Zone as a prison because he felt that it would become abused, since no blood was shed, it became a clean way to deal with criminals. In the Argo City area he lived in he was a very trusted scientist, like his brother Jor-El, and was working at this time on Sun Stones. He fought with Jor-El over the use of the Phantom Zone and tried to stop him from supporting it. Zor-El began to see that each time someone went in, something was also coming out, in the form of Phantoms. These Phantoms possessed people, creating anarchy on Krypton. Zor-El discovered he could stop them using his Sun Stones, although the bodies of the possessed would be destroyed. However, Zor-El was not believed and began to be seen as a dangerous crank.