Maybe the complex relationship between the two characters. The idea of one character hurting the other can create a lot of drama and tension, which is often interesting in fanfiction.
You can start by looking on fanfiction.net. It has a large collection of various fanfictions, including those related to Zane Truesdale and original characters. Just use the search bar and type in relevant keywords.
There are so many fanfictions out there that it's difficult to specifically point out ones related to 'zane truesdale hurts syurs'. You could join relevant fan groups or forums and ask the members there. They might be able to direct you to some good ones.
One great Zane Truesdale OC fanfiction is 'The Rising Star of Zane'. It focuses on an original character who becomes Zane's protégé in the dueling world. The story is full of exciting duels and character development.
It could be an old rival from his past dueling days. Someone who has always been envious of Zane's success and finally sees an opportunity to take him down, either physically or in a more metaphorical sense like ruining his reputation.
One possible reason could be a rivalry over a powerful card in a card game. Maybe another character has a card that Zane desperately wants for his deck, and their negotiations turn sour, leading to a fight.
In some cases, it could be a group of jealous fans. They might abuse Zane verbally, by booing him during duels or spreading mean - spirited comments on dueling forums. Their collective hatred could be a form of abuse that really affects Zane's confidence and performance.
In the Yugioh fanfiction, Zane may start off feeling a bit frustrated about being stuck babysitting. But as time goes on, he realizes that he can use this opportunity to teach the kids about responsibility. He can show them how to take care of their Yugioh cards properly, like keeping them in good condition and not losing them. He might also tell them stories about his own Yugioh dueling experiences to inspire them and keep their attention. And when the kids misbehave, instead of getting angry right away, he tries to understand why they did it and then correct them in a more positive way.
One possible plotline could be that Zane is being verbally abused by a rival duelist who constantly taunts him about his past losses. This might lead to Zane having self - doubt and struggling in his duels.
Their different personalities. Aster is more flamboyant and confident, while Zane is cool and reserved. This contrast can create interesting dynamics in fanfiction.