For three full days, Su Shi'er worked on setting up formations.
Upon the cave dwelling's original formations, he added several more layers of formations.
Only after seeing the formations activate, utterly transforming the aura and atmosphere both inside and outside the entire cave dwelling, did Su Shi'er finally feel at ease.
Arriving at the secluded cultivation chamber closest to the Spiritual Plant Garden, Su Shi'er hesitated no longer and raised his hand to take out the Heaven and Earth Furnace.
Su Shi'er had used the Heaven and Earth Furnace for over a century.
Yet it looked no different from when he had first been in Little Stone Village.
The Pill Furnace stood on three legs with a rounded belly, its surface engraved with intricate patterns of flowers, birds, insects, and fish. The designs were covered in dust, lending it a dim, ancient air. It seemed to have weathered countless years, yet it was also plain and unremarkable, drawing not the slightest attention.
Empowered by surging True Yuan, the Heaven and Earth Furnace expanded with the wind. In the blink of an eye, it had become enormous, occupying nearly thirty percent of the secluded cultivation chamber.
Two hundred top-grade Spirit Stones, along with a great number of low-grade and mid-grade Spirit Stones, were dumped into it by Su Shi'er in one go.
In an instant, brilliant azure light blazed within the Heaven and Earth Furnace, and an unfathomable aura filled the entire secluded cultivation chamber.
As the azure light flowed, the low-grade Spirit Stones inside the Heaven and Earth Furnace visibly fused and condensed at a rapid pace.
In merely the time it took to drink a cup of tea, nearly half the Spirit Stones in the furnace had vanished, replaced by a great many mid-grade Spirit Stones.
Su Shi'er knew