Concepts

 The red-eyed tree frog, when threatened, flashes its red eyes at predators to startle them. While the predator is startled, the frog uses this chance to run away. Imagine someone who casts an illusion magic to make their opponent see someone startling, like their mother, and then the caster uses this chance to disappear.

 "The reason he/she never noticed his/her disorder is because he/she has always seen a disorder as something that interferes with a person's life. But to him/her, his/her disorder is  his/her life."

 A sword that will grant great power to one who is worthy. In actuality, it's a myth that's been compounded with decades of confirmation bias. If someone succeeds and performs an amazing feat with the sword, they were worthy of the sword. If someone dies while wielding the sword, the person was not, in fact, worthy and the people had thought wrong.

 A hero who has a child but refuses to teach the child how to fight. After a couple years, when the child is finally grown up, the hero admits why they refuse to teach the child. "As a hero, it is my job to defeat the bad guys so that this place is safe for people like you to grow up and live in. If I teach you how to fight, it's like I'm admitting that no matter how much good I do, how many bad guys I defeat, it'll never be enough to make this place safe for you."

 A loner archetype mercenary/monster hunter/assassin/etc., Actually works better in a team setting and is willing to work in teams, but still acts as an add-on rather than part of the team. Actively pushes others away but deep down is very lonely ~~ mysterious past that no one knows ~~  Turns out it's because he/she have powerful enemies and knew they'd catch him/her one day, and didn't want anyone to miss or try to avenge/save him/her.

 A rumor of a monstrous person/creature living in a cave, where even the bravest and toughest of soldiers come running out, bloodied and bruised.  The hero goes in, and it's very dark. Even with a lamp, the hero can barely make out what's a few feet ahead. As the hero continues walking, whispers are echoing throughout the walls. The further in the hero goes, the more whispers there are and the louder they seem to get, until it's like they're screaming inside the hero's head.  There are also traps strewn around. Typical spike and boulder traps, but paired with the loud whispers, the hero is really put on edge. The hero is able to avoid them with relative ease.Gradually, the hero feels their heart rate spiking, their breathing more labored, and their vision seems to blur. The traps appear more frequently, and the hero is less able to avoid them like before. The hero finally makes it to the end, where there's an empty throne. The hero walks up to the throne, when s...

He doesn't listen to the rules. He lives in his own world- a world where down is up and black is white. He rejects the world around him and instead pulls those around him into his world - a world where the rules are dictated by him - until they no longer remember what was common sense. Until they've forgotten a world where left is not right and two is not five.