Only way this works is if the one reading it knows your culture was technologically advanced, for-real and not just in your own estimation, and has some appreciation of what that might mean.
Otherwise, "curse of the mummy? LOL, yeah, I'm sure that's a real thing. Must be something great buried here. Watch out for actual traps, but we're about to get rich, boys!"
> Only way this works is if the one reading it knows your culture was technologically advanced, for-real and not just in your own estimation, and has some appreciation of what that might mean.
This is pretty well guaranteed if they can read your message at all.
I alluded to European expeditions to Egypt for a reason :-)
Though maybe there's only a brief window of development in which a culture is both not superstitious enough to be scared by this, and also lacks the technology & knowledge to figure out what you actually mean and verify it themselves.
Otherwise, "curse of the mummy? LOL, yeah, I'm sure that's a real thing. Must be something great buried here. Watch out for actual traps, but we're about to get rich, boys!"