Kapitel 132: Four Leaf Cup Concludes

"What do you mean?"

"That golden enhancement technique consumes a lot of spiritual energy. Only, almost no one here knows it because to Aura Sense, the continuous consumption of spiritual energy feels very similar to an increase in spiritual energy. It takes a highly developed, practiced, very sensitive Aura Sense to distinguish it without the user's spiritual energy decreasing for long enough to have dropped noticeably more quickly than normal.

I'm not sure if maybe a huge amount of training could allow a Spirit Rank cultivator to reach that level of Aura Sense, but I only reached that level shortly after breaking through to Heaven Rank. In my opinion, even a genius in the area of Aura Sense would have to be at least Seventh Spirit Rank."