As Jenlyns said this, he looked over at Hanjun, clearly wanting him to come up with a solution.
Hanjun rested his chin on his hand, thinking hard.
This was indeed a problem.
In war, it wasn't about which side had more troops, but rather which side was stronger overall.
The demons certainly had wizards who could use forbidden spells.
The only reason they hadn't used them yet was that they believed they could easily crush Ulon City without wasting any magic.
But once they realized that Ulon City was a pesky opponent, they would quickly take action to eliminate this troublesome threat.
Hanjun could indeed prevent this from happening, but he wanted humans to stop relying solely on his power.
So Hanjun said, "No problem, I'll have the heroes create a barrier. The barrier will have enough defense to withstand three forbidden spells."