Martial Peak - Ch. 2921 - The Ancestral Land

[MangaDex]

 

[Kaarme]

The problem with secrets is that after enough time has passed, it's possible nobody will remember anymore what it was all about. If it was good or bad. This is also an issue with storing nuclear waste permanently in deep dungeons. If something happens to our current civilisation, then after countless generations, folks might not anymore realise what dangers lie beneath and start digging them up.