Where had the ancient tombs in the world of immortals come from?

Who built the tombs for the immortals fallen in battle?

Survivors of the immortal war?

The tombs didn’t accommodate just one or two people, but whole sects, aristocracies, or even an entire dynasty in some cases. Neatly laid out with burial goods, chambers, and all sorts of secondary structures, these tombs forested the world. Such proliferation went beyond the limits of human capability.

If the mighty powerhouses of the ancient era yet survived in the present day, how could their cultivation path have ever been severed? What need would there be for contemporary immortals to fumble around on the dao of immortals?

The slew of tombs in the world had...