Mother Mold

There's no sign of the Codex or Sinister, but if you keep moving, hopefully you'll find it. Cable activates a motion tracking-sensor so you'll be warned if anything approaches.

You've reached the factory floor, where the Mother Mold takes notice. She is aware of Cable's timeline, and intends to kill the "Mutant Messiah" before it can come to pass. She activates the Nimrod Sentinel which seems impervious to Cable's weapons. Cable blows open a door for you to escape through.

Cable tries to teleport you away, but the Nimrod can also teleport. It turns its attention to you, but Wolverine and Bishop drop a broken Sentinel onto it. The others will buy you time to find the Codex by keeping Nimrod occupied. Go!

Mr Sinister meets you and explains that he did provide Trask with an incomplete Codex, but kept the true Codex for himself. He intends to let Orchis exterminate mutants, and then let humanity destroy itself. He will resurrect mutants under his control. He gives you the Codex, but you will see that the future cannot be altered.

You arrive back in Krakoa, where Sinister has arrived with a fleet of Sentinels! It's an invasion force. The assault must be repelled.