Auspicious energy, though scarce, is much purer compared to the ordinary and murky spiritual energy.
Auspicious energy doesn't require extra purification; once it enters the body, it can directly transform into True Qi or Spiritual Energy, or even Fu Xi's Energy.
It's precisely because of its rarity that auspicious energy is incredibly precious.
Generally speaking, the auspicious energy that naturally exists between heaven and earth is as rare as phoenix feathers and unicorn horns.
The strands of auspicious energy before us, though feeble, seem to have an ancient and enduring source.
Otherwise, the choosy nature of the Pride Corpse wouldn't care about the tiny amount of auspicious energy mentioned in the Garden Manual.
Of course, not just anyone can recognize auspicious energy at a glance.
At the very least, the supervisor of the Shaking Light Class can't, or else they wouldn't overlook such a fine location, leaving it deserted.