Whenever He Song occasionally lifted his eyes and swept his gaze over them,
it fully confirmed what he had previously thought.
Whether in terms of growth speed or the accumulation of medicinal power within them, these spirit herbs far surpassed their counterparts in the outside world.
The difference had indeed reached several times over.
In other words,
medicinal power that would originally require several centuries to accumulate before it could be used to refine Spirit Transformation elixirs
could be obtained after merely a hundred years of growth for these spirit herbs within the Nine Abyss Return-to-Void Array that He Song had set up regardless of cost.
However, there was a clear reason for such an improvement.
First of all, the Nine Abyss Return-to-Void Array He Song had laid down was already extraordinarily remarkable.
The spiritual energy concentration inside was likely no inferior even to that of the Spirit Transformation Spirit Gathering Array.
Yet the spiritual energy concentration within the Spirit Transformation Spirit Gathering Array
was certainly sufficient to support the cultivation of Spirit Transformation cultivators.
It was not something an ordinary medicinal garden could compare to.
Moreover, in order to maintain the operation of the Nine Abyss Return-to-Void Array,
He Song needed to invest a vast number of Spirit Stones every year to sustain its consumption.
Beyond that,
the Nine Abyss Return-to-Void Array continuously absorbed spiritual energy from the outside world, supplying it to the many spirit herbs within the array.
Therefore, both the spiritual energy concentration and the speed at which spiritual energy was replenished within the Nine Abyss Return-to-Void Array were truly terrifying.
No medicinal garden outside could possibly compare to it in this regard.
Other cultivators planting spirit herbs could never be like He Song, capable of setting up such a composite grand array comparable to the