- Location
- Pittsburgh, PA
Off the top of my head, you could have it be that the train itself doesn't absorb ambient Essence, but instead the tracks are lined with spaced-out "lightning rods" that do that instead, and then you have this very Autochthonian-looking process where these terminals discharge crackling bolts of energy into the train as it passes them, and you can have situations where the people controlling the train try to keep the local geomancy "clean" (Yozic - or necrotic, or even Lunar - Essence probably doesn't do good things if it gets inside the train's machinery) and have to deal with poachers that try to siphon off the terminals' Essence reservoirs for their own purposes.Actually, on that note, I wonder...
Ok, is there any reason not to simply allow your artifacts (trains?) to simply absorb ambient essence? Instead of spending a hearthstone on them?
Mind you, that's probably something you'd see more in a Shogunate-era campaign, barring one surviving line out in the Scavenger Lands or something that's obsessively protected and supported by the god of that form of train, desperate to keep his portfolio from vanishing entirely and always pushing to increase its importance within the region so Heaven doesn't put him out of a job.
As for the larger hearthstone thing... I don't really know? I just don't have much affection for the Everything Needs Hearthstones idea, personally; I'd rather see manses and demesnes matter because of what they do and how they can be turned to a character's purposes, not because they produce magic batteries.