To put it bluntly, a domain was a type of use of power. At the same time, when a divine level expert set up a domain, it would also help the divine level expert absorb energy.
Zhao Hai knew this when he used his domain, but he couldn't tell Xu Wanying and the others about it because Zhao Hai didn't have the experience of learning a domain, so Xu Wanying and the others had to do it themselves.
After all divine level experts comprehended their domains, they would become even more proficient in the use of their power. In the past, he could do things with 100% of his power, but now, he could do it with only 50% of his power. Moreover, the process of him attracting power was also about 40% faster than before.
The Pope and the others looked at Xu Wanying in a daze. They didn't know what had happened to him and why he had suddenly created such a thing.