Ruins Emperor Palace was a sacred land of the Heaven Fey City. Not only did the Ruins Emperor himself cultivate in the Ruins Emperor Palace, the other two Heaven Fey patriarchs would also seclude themselves perennially in there.
Legend had it that before Heaven Fey City was established, this piece of land was once a land of peril!
The Chaos Heavens had many lands of peril where death was deemed certain upon entry. But in fact, many of them had a limit to their danger. That limit was at the Divine Lord realm and below.
However, the land of peril upon which Heaven Fey City stood was one that could perish Fey Thearchs or Godly Monarchs!
The Fey deemed this restricted zone No Return For Thearchs.
Even across the Chaos Heavens, it was a terrifying land of peril.
People naturally avoided such a land of peril.
But typically speaking, the more dangerous some place was, the more hidden opportunities there were.