Ascension

From Command and Conquer Wiki

The term Ascension was a religious belief shared by the followers of the Brotherhood of Nod.

The actions of Kane are set to bring about Ascension to the faithful and those that share his vision of a Tiberium future for the world. After his "death" in the early part of the Third Tiberium War, Kilian Qatar stated that the Brotherhood would need to put all word of Ascension aside while Nod attempted to survive. Once Kane returned, he placed his plans on Ascension once again.

The details on Ascension are not truly explained except that it is the underlining goal of Kane's mission.