I think you mean out of space aliens but technically advanced messengers bringing teachings like agricultur, writing, and metallurgy, demanding offerings in ret

I think you mean out of space aliens but technically advanced messengers bringing teachings like agricultur, writing, and metallurgy, demanding offerings in return and keeping relative peace fits the bill just as much, especially if the Lords ventured from places high in the sky, mountains that is. At a lower layer, it's just veneration of the elders, preservation of memory through old stories traveling through time, not space.