[ Ah, he notices it. It doesn't escape his eyes. ... Good. He's listening. ]

Rather than just locking things away... why not help the rest of them leave? Then you can cease to be. You wouldn't have to suffer anymore.

... Of course, it goes without saying, that I have not yet told them this. If I did, it might cause them to fight one another even more, and I want to avoid such strife... but you... you have always been able to work by yourself, have you not? There is... two ways to link world and World. One way is impossible for all of you.

The other... it requires all the World Keys, and a choice.