C2470 Second Ghost General(part Ii)
Yes, that black mist was Fu Kesi's soul, which was also the first Ghost General that Chen Feng had refined.
The one with the white mist was even more powerful. That was Chi Shu's Nascent Infant Stage, and also his second Ghost General.
It turned out that when Chen Feng killed Chi Shu, he had used a secret art. The Green Lotus Sword did not actually cut through Chi Shu's Nascent Infant Stage