How will you pay?

"We will give you a universe that you can rule," Louie pauses, "or destroy."

Qin shrugs. "That's boring." 

And sort of cheating, he doesn't add that. As he has travelled through many worlds, he knows that many universes or realities can coexist at the same time while these worlds might be a lot similar or completely different. Sighing, he leans back. He will let others decide his fate. 

Other passengers might be different from them on the train. Ye Jing-e realises that things might be way more complex than he has expected.

"Most mortals will forget about the passengers. In some people's memories, you will be a blank spot or some distant vague memory that doesn't affect them much. If you have taken other people's identities, they might forget the memories after a certain time, that is, the time after the original owners died."

The four passengers already know about that. However, it's not always true.