Merely the energy source of the stars - unmatched when harnessed to generate power.
[ Well, she's sure that some energy sources that are highly theoretical in her world must power this train - but those are only ever a matter of time if humanity survives. ]
no subject
[ Well, she's sure that some energy sources that are highly theoretical in her world must power this train - but those are only ever a matter of time if humanity survives. ]