John and the others naturally became serious after getting the information from Mira. At first, they really cannot believe that the warriors of the Warrior Association will get affected by those nightmare Monsters but it looks like they already get affected by those nightmare Monsters.
Well, there is a possibility that even though those Warriors have high mental power, what if those dark humans decided to attack them using the mental attack and those nightmare Monsters using the chance decided to affect them and came inside of their mind?
This is the possible case anybody could think of right now. First of all, you should know that not everyone can join the Warrior Association. Even if any Warrior after graduating from the Warrior Academy decided to join the Warrior Association then they would go through some hard training.
