At the descent of the dragons, Nicholai seemed to figure out that the Luminescent King came there for him. After all, he had given that proud man quite a humiliation of a lifetime. Not only did he snatch Lord Zhu's body to use for a fight, but he also kicked the dragon through the doors of the Frost Castle. It was good that his dragons were conscious enough to cover him from the eyes of many.
When the dragon king zeroed in on a spot, he saw a blackish werewolf looking straight at him with a wide grin. The Rogue King's crest was pulsing above that wolf, and those were enough signs that the werewolf was no one else but that despicable Nicholai Rudolf.
It's just that Lord Zhu also saw the Ashen Queen duking it out with the Mirage Queen. Even from the distance, he saw the Shadow King torturing the werewolves that would dare run away from him. Directly underneath him stood the Frost King and the glaring Cosmic King.