Complete story — includes the ending
In the present, Magneto and Xavier show Cyclops the plans to the Mother Mold, a Master Mold that creates other Master Molds. They believe that the Mother Mold will usher in a new generation of Sentinels and that this is when Nimrod emerges. They order a strike on the Mother Mold, which is on a station orbiting the Sun, and Cyclops leaves to assemble a team.
100 years in the future, a Cardinal and Rasputin return successful from their mission, having retrieved an indexing machine which will allow them to know the location of key machine intel. Krakoa manages to successfully de-crypt the index, revealing the location. War points out that the information is useless, since they would have to hold off the Sentinels in order to access the interface, which would in turn be a suicide mission, but Apocalypse assures them that they will succeed, as he will personally lead them.
1000 years in the future, the Librarian and Nimrod have been successful in their plan. In order to prove their value to the higher civilizations in the universe, they create a collective intelligence called the Nimbus, which transforms Nibiru into a Worldmind. The Worldmind is found by the Phalanx who successfully consume it and come to Earth to find its creators. They ask them what it is they seek, and they answer "ascension," wishing to be absorbed into the Phalanx collective.
Sources and content license
Source and revision history ↗ · Adapted from Marvel Database contributors, Powers of X Vol 1 2. Illustrations and reference markup removed; synopsis paragraphs combined. · Content license