Though the Soul Seed Puppet was not a physical entity, nurturing the soul was the essence. The cracks appearing on the Soul Seed Puppet were actually grave injuries to Shi Hao.
If it split in two, not to mention striving towards ten steps, his realm would be forcibly slashed down and in a single night, he would fall back to Breaking the Extreme.
And with the soul having sustained such heavy injuries, it was impossible to condense the Soul Seed again; he would need top-notch Spiritual Medicine for nourishment.
But now, Shi Hao was out of options.
If he could not sever the heavenly and earthly shackles, his rebellion against the natural order meant he was facing tangible energy ready to sever him from life, so either he broke through the shackles or he would be slain by the heavens and the earth—with no third option.
Come!
Shi Hao continued to draw in the energy of heaven and earth, Nine Revolutions Sky-Plundering, plundering, plundering, chopping, chopping, chopping!