In the sky.
The Dragonlance in Zhong Zhichang's hand glimmered, repelling the Black Emperor's assaults time and again. The strength of the Black Emperor was not inferior to that of an average Dragon Knight. Moreover, she was extraordinarily cunning, compounded by possessing the immortal characteristic. Even forcibly using divine consciousness to destroy her was a difficult feat.
Zhong Zhichang's original intent was to ensure that the battlefield remained wholly here, not eager to erupt into full conflict, merely engaging in continuous entanglement with her.