Deciphering the code

This was a very obvious problem, but normal people would easily overlook it.

Why did this mysterious Gu Immortal go through such great trouble, brave enormous risk, tamper with and use Giant Sun Immortal Venerable's arrangement to set up their inheritance?

"Thinking from their perspective, if I was this Gu Immortal, why would I insist on digging out Eighty-Eight True Yang Building's loophole to set up my inheritance? I could set up one by myself perfectly by just spending a little effort!"

"Eighty-Eight True Yang Building is a rank eight Immortal Gu house and was personally arranged by Giant Sun Immortal Venerable. There was truly an enormous risk in using its loophole. If I wanted to wholeheartedly leave behind an inheritance, there would be absolutely no need to go so far and intentionally take risks. Unless…"

Fang Yuan's eyelids drooped as a cold light flashed quickly past his dark pupils.

"Unless — the inheritance required such an arrangement!"