No one was willing to take the risk. If the location had been different, then although the forbidden weapons would still remain terrifying, all these Overlords could evade them with their speed. The weapons would simply be unable to lock upon them. If that was the case, they'd have a good chance to win.
However, in the death zone, everyone's senses were suppressed. They basically couldn't respond in advance and dodge, so they were unwilling to take the risk.
In the end, the three parties chose to conceal themselves and calmly wait for an opportunity.
The four Overlords were convinced that since they were able to guess that Devil was in one of the ten forbidden zones, then there would be other powers in the six continents who would have guessed as well and thus come in search of him.
Their guess soon turned out to be right. A fourth power arrived when the night began to fall on the land.
"Extreme Devil Path sect's Yan Xing!"
