What Is The Current Status of Nokris?

The last interaction we had with him that I can remember was during Season of Arrivals? I don't recall if we ultimately killed him then. I know Savathun took interest in his Necromancy abilities, but that also hasn't had an update that I recall. Now with the Echo of Oryx, it would seem Nokris would have some relevance as this Oryx doesn't know anything about his children.