TatsuyaShiiba
The "Mc" must overcome that fear / nightmares that he has, since it is a weakness, since in a confrontation they could cast a spell that makes you relive your worst memories, and those nightmares would resurface, unbalancing him and making him lose, so the "mc" needs to overcome his fear, face whatever is tormenting him like a crazy psychopath with a big smile on his face, (I don't know if you understand me), the "mc" should not be afraid of anything if he wants to get to be great in life.