Actually, according to the original plan laid out by Ling Weiyang and Xi Zhao, Xi Zhao wouldn't have revealed his identity so soon, because although his actions would make the people of the Netherworld World suspect something, they could only harbor doubts without evidence. A covert operative is far more terrifying than a known enemy. Moreover, the original plan was for Xi Zhao to betray them at the critical moment of the final battle, just like He Tu had done. The impact of such a betrayal would undoubtedly be significant, and if handled wisely, turning the Netherworld and its allies against each other was not out of the realm of possibility.