Mo Wuji’s choice was ultimately the Transcending Mortality Pill. The Transcending Mortality Pill was very valuable and the refining difficulty was only considered to be average among all the other Tier 3 spiritual pills. Mo Wuji felt it was the best to use such medicine to study about Tier 3 spiritual pills.
After igniting the earth fire as well as cleaning the furnace, Mo Wuji sent the different herbs into the furnace. The first step was to purify the spiritual herbs. He could do this very well even when he was at Channel Opening Stage Level 4. Presently, he was much more comfortable and familiar with this and he finished purifying all the herbs in about half an hour.
Only up till now could Mo Wuji truly feel his own improvement. Back then he required so much more effort to purify a Tier 3 spiritual herb as compared to now.