That, OR Ashura wakes up and stalks Fai through dimensions. XD; With the help of a feather, like Dr Kyle.
I don't think feathers give you the power to travel dimensions, because then Syaoran-tachi wouldn't need cute and cuddly Mokona. I wonder though, if Ashura does wake up, could he travel demesions that freely? Or would it be like Fai, that he can only do it once, because I get the feeling that Ashura will be the one coming to them.
Although that stalker idea sounds funny to me XD
actualy when kuro said "i dont care about your past" he more or less means that he doesnt care what fai did, even if fai had done something as terrible as destroy his world.
I know I know but what I meant when I said that, is that Kurogane says that what happened in Fai's past isn't important, because it didn't involve him. But he still wants to know what it was that led Fai to his wish of never returning, or else Kurogane wouldn't bug Fai about it as much. ^^;