It is indeed related to the Black Fog.
Rod raised his right hand and decisively used the Eternal Dream.
The Dream Realm now contains over 800,000 nightmare fuel, enough for him to create over 100 portions of Eternal Dream. Using one here is absolutely no problem.
Invisible flashes flew out from his palm, merging with the Holy Fire—he did not direct the Eternal Dream at Qingyu, but at the Holy Fire.
At first, the Holy Fire showed no changes, but soon, an intangible ripple appeared between the Holy Fire and Qingyu. In the void, the faint sound of rumbling could be heard, as if something enormous was turning.
Suddenly, Qingyu's soul aura became extremely exalted, some high-ranking entity established a connection with her, intangible power transmitted through the Holy Fire into her soul. Almost in the next second, Solos shouted: "Good!"
