Sands of the West Chapter 2: Redfang
"this is the _west continent_ -you do what you have to to make sure you don't wind up like the ancient ruins scattered all over this land -a forgotten skeleton of your former self, buried beneath the sands.
Erika - Shattered Glass
There was a wealth of vegetation that covered the planet and blue oceans, there were also collections of stones that could have been ancient ruins but no people on the planet existed.
Dokkaebi
Well seeing as your so called theory revolves around you snooping around ancient ruins that were left long ago. wouldn't you have committed several other moral disgraces in the act of pilfering a tomb of those who have long since left this world.