Clockwork Doom train?

[Daralii]

The "Phantom Train" has already been mentioned in this game during the whole "escape from castrum centri" questline. Yda mentions how it is the way they sneaked into the place.

Whether or not this has to do with a doomtrain later on idk, but it's worth mentioning.

Yeah, all the castrums in Eorzea are connected by trains called Phantom Trains. You can see some of the tracks at the Mor Dhona/North Thanalan border.