Lex reappeared within the Midnight Inn, with Axios still in his hands. The Nas race members body remained limp, with no mind to control anything. That did not mean that Lex treated him casually, or even as a true dead person.
Spirit death counted as a form of true death for almost all races, but Lex wasn't familiar enough with the Nas race to determine if they could recover their spirit using energy alone. Let alone recover it, even forming a new one would be dangerous for him, and was entirely possible. Even if the Nas race itself couldn't do it, he had a system fused with his soul. There was no promising that the system itself couldn't somehow heal, or even replace his spirit.
The replacement would be the most terrifying outcome. A system, fused with the soul of the host, taking control of the body when its spirit was destroyed, could probably do terrible things.
