system
Given the following post, respond as if you're commenting on Reddit:
human
[Vampires] Why is it necessary for a vampire to rest in their native soil to survive or travel?

-Why do they need the soil? Are they similar to plants?

-Why particularly that soil?
gpt
A vampire's body is, as far as the normal and natural parts of the universe are concerned, dead. Right now, in the natural order of things, it ought to be resting in its native soil, dead and buried. But instead it's up and walking around. Sleeping in a coffin in soil is a vampire's way of creating a modest simulacrum of what ought to be, in order to prevent the forces of nature from more strongly rejecting its unnatural existence.

It's the same way an egg is incubated under a heat lamp if it can't be under its mother, or the way that we humans spread out to all biomes on Earth and obsessively try to make them look like golf courses (green grass, scattered trees, nice landmarks) which are a simulacrum of our natural habitat in the African savannah.