A huge battle burst high up the canyon, and many monsters acted at the same time. All the other demonic beasts were looking for opportunities as well.
Qi Xuangang held off the Holiness of Nirvanas from the Violet Heavenly Palace all on his own, fighting to a deadlock in the air. While his plane was indeed high, the ones he was fighting with were of a supreme force in the Heavenly Mandate Realm, after all, and they were extremely formidable.
No common Holiness of Nirvanas would have been able to fight against him otherwise, given how he was already at the edge of breaking into Renhuang Plane.
He had ended up killing the Ninth Servant at the Ancient Imperial City, which was known as the number one city back in Crimson Dragon Realm back then.