The MetaRail

Ages and ages ago, the Engineers laid tracks of stardust between the twelve worlds. They wove the MetaRail through the void and constructed stations on ten of these worlds so that their populations would flourish and advance alongside one another.

The last two worlds the Engineers wisely kept apart from the circuit, for on these worlds were secrets that only the almighty Conductor could bear to know. One world is said to be where the Engineers returned after their labors; the other is said to be a place where darkness reigns eternal.