Within the Small World, the Sì Beast suddenly let out another resounding roar.
As the roar rang out, the Sì Beast, originally no larger than a calf, suddenly began to swell in size.
In but an instant, it had grown as large as a full-grown giant elephant.
With its great mouth opening and closing, the Blood Demon Fiendish Energy it drew in with each breath was more than ten times what it had absorbed at the start.
The spiritual energy spilling from its body also surged in speed.
After several breaths, the Sì Beast's body began to expand once more.
In less than the time it took to drink a cup of tea, its body had already grown to over a hundred zhang long.
Its enormous body alone resembled a small mountain, coiled within the Small World that spanned tens of thousands of zhang.
Its breathing continued. At such a size, every breath caused great swathes of Blood Demon Fiendish Energy to vanish from the Small World.
Throughout the process, the Sì Beast's cultivation rose at a pace visible to the naked eye.
Normally, even in the Small World where spiritual energy was abundant, the Sì Beast's cultivation advanced slowly. Several centuries had passed, yet it had improved little, only reaching a level comparable to a Nascent Soul Cultivator.
But at this very moment, in merely a few breaths, its cultivation had surged to the peak of the Nascent Soul stage and begun charging toward the Out of Body stage.
And unlike human cultivators or Demon Cultivators of the Demon Race—
There was not the slightest sign that the Sì Beast would undergo Tribulation Transcendence as its cultivation rose.
Nor did its massive body show any signs of taking human form.
"This... the Sì Beast is an Ancient Auspicious Beast,