I'm not sure specifically what the 'big shad story' is without more context. It could be a story about a big shad fish, perhaps its adventure, or something related to a particular place or event involving a shad.
Without more knowledge of the 'big shad story', I can only speculate. If it's a traditional story, it could detail the shad's role in the local economy, like how in the past shad were caught and sold. It might also talk about the superstitions or beliefs associated with shad in a particular culture. For instance, some cultures might believe that a big shad is a sign of good luck or a bountiful fishing season coming up.
The name 'Shad Thyrion' doesn't ring a bell in terms of a well - known story. It could be that this is a relatively unknown story, perhaps something local or related to a particular field or group. If you can provide any additional information, such as the genre of the story (mystery, adventure, etc.), it would be really helpful.
Since I'm not familiar with the Shad Thyrion story, it's impossible to list the main events. However, if it's a typical story, main events might involve the protagonist's journey, challenges they face, and how they overcome them. For example, if it's a hero's story, there could be a call to action, a series of battles or difficulties, and finally a resolution.
It could be that 'Shad Viciouz' is a character or a group. When it says 'Based on a True Story', it implies that there are real - world elements that the story is built upon. For example, if it's a movie, the plot might have been adapted from a real - life incident, and 'Shad Viciouz' could be the central figure in that story.
Since the term'shad viciouz' is rather unclear, it's difficult to give a precise interpretation. However, when we see 'based on true story', it generally gives the work a sense of authenticity. It could be that'shad viciouz' is part of a creative work, like a short story or a documentary series. In a documentary, for instance, if it's based on a true story, all the events and details related to'shad viciouz' (whatever it may be) should be based on facts that can be verified through research or eyewitness accounts.
Since we don't know exactly what'shad viciouz' represents, let's assume it's a character. Maybe Shad was a historical figure who had a rather vicious or aggressive nature. For example, if he was a pirate in the past. If there was a book or a movie made about him with the tag 'based on true story', it would mean that the story of this Shad character was based on historical records, like ship logs, eyewitness accounts from the time, or official documents from the relevant era.
A lot of these fanfictions also explore the idea of transformation. Maybe Shad has the ability to turn Sonic or Amy into vampires, and this creates a whole new set of conflicts and relationships. Also, the theme of mystery often comes up. Vampires are mysterious creatures, and Shad's actions and motives in relation to Sonamy can be full of mystery.
One popular Sonamy and Shad Lemon fanfiction might be 'The Forbidden Love' which explores the complex relationship between Sonic and Amy in a world where Shad's presence adds an interesting twist. It could involve Sonic's internal struggle between his feelings for Amy and the strange connection he has with Shad.