Hao Ren had been in the critical moment of cultivation. The threads of nature essence released from the Poison Pill Plan traveled in his body randomly. Meanwhile, the nature essence that he had cultivated in this week charged at the spiritual core where Zhao Haoran's 1,000 years of cultivation strength was stored.
While the two kinds of nature essence mingled in his body, Hao Ren had to hold his breath and concentrate on dealing with them. He had a few glimpses of the fierce battle outside, but he couldn't help them with his sword energies, let alone rushing out to rescue them.
Since the creation of the world, Yang and pure represented heaven while Yin and turbid resembled earth. The two kinds of nature essences in Hao Ren's body were in sync with the Heavenly Dao.