"There is a mass of miasma in your Spirit Sea, which likely explains why you have been unable to continue absorbing Spiritual Energy..."
After a moment, Mo Wangchen withdrew his hand and spoke softly to Shi Yan.
Shi Yan nodded, "Back then, Yun'er and I ventured deep into the mountains where the miasma was heavy. I was unconscious for several days before being found, and even though I was rescued, the miasma absorbed during that time was enough to block my Spirit Sea."
The Spirit Sea is the foundation of a Cultivator. Even the Great Powers of today are powerless if something goes wrong with their Spirit Sea, requiring Divine Medicine to repair it.
But the No-Thought Sect is just a second-rate force within the Eastern Desolate. Divine Medicine is exceedingly rare and precious; not to mention whether they possess it or not, even if they did, many would likely oppose using such medicine on Shi Yan.
"While troublesome, the problem isn't overly severe."