Zhao Hai's words were reasonable. In fact, the gods who attacked him were already under the curse. The curse was under Zhao Hai's control. If the gods didn't come down to the lower realm, Zhao Hai would just let the curse take effect. However, if the gods came down to the lower realm, the curse would be even more effective. It could directly take the gods 'lives, and then all their Godheads would belong to him.
Although Zhao Hai didn't know what use the Godhead had for him, he was sure that it would be useful to him, and it would be very useful. That was why Zhao Hai wanted to collect more Godheads. It would be even better if those gods really came down to the lower realm. However, judging from their methods, they wouldn't be coming down for a while.