While it was sound theoretically, reality was cruel!
It was probably because Xiao Leng's speed was too fast that the Demon-Killing Battle Kings behind could not catch up at all. Furthermore, they had to stop occasionally to kill Netherworld Envoys. Hence, Jiang Yi flew unstably for a few minutes but did not see anyone else at all.
Swish! Swish!
A slight air-splitting sound rang as the spatial zone beneath started to tremble slightly. Jiang Yi's face darkened as he felt a stench of cold and evil aura swiftly nearing. Without saying, a black demonic beast was approaching.
Buzz!
The Fire Dragon Sword appeared in Jiang Yi's hand as he shot out tens of thousands of tiny fire dragons downwards. Fire dragons filled the skies as they wailed down, dispersed the black fog, and lit up this side of the sky. Jiang Yi could clearly see an ugly black demonic beast flying towards him.