King Geng's and the prison cell's image that Zhong Yue saw were merely hallucinations that Mother Ghost created based on Zhong Yue's perception of the Abyss. Zhong Yue saw through her tricks right at the moment they met and knew that they were just illusions.
Furthermore, it wasn't hard at all to calculate Mother Ghost's position from her shadows.
When Zhong Yue was fighting her, he purposely proclaimed himself as King Geng's subordinate to deceive Mother Ghost.
After all, King Geng was the late Realm Monarch's younger brother and he was a prideful man. If Zhong Yue called him younger brother, Mother Ghost would have many suspicions and grow more cautious in the battle. However, announcing himself as King Geng's subordinate was a perfectly reasonable lie that Mother Ghost wouldn't doubt.
And everything he had done, from the first step he took, the first word he spoke, and the first move he made—it was all meant for this one deadly blow.
