The Big Reveal.

Legion-7 caused the shards of power in the world fragment to riot. He didn't know where they were. He only knew that they were part of his body.

The shards of power affected every clone and made different unpredictable things happen to them. These things happened to every clone, regardless of their position in time and space. 

The fake world was shaken from both inside of it, due to Helios, and out of it, thanks to the shards of power. The world sought to push out Legion-7 which he gladly accepted. 

But Legion-7 was connected to all of them, so he managed to pull them out of the whirlpool and awaken them. The whirlpool disappeared around them to reveal a white world.

This is their mental space. It should be where they are strongest. Unfortunately, there's still a 10th mind here. He had followed them from wherever they were to the very sanctuary of their minds. This proved that he was truly connected to them. He wasn't lying about that.