One such fanfic could be 'The Aftermath of Harry's Faked Death'. In this fic, the wizarding world is in chaos after believing Harry is dead. It shows how his friends deal with the grief and how they start to uncover the truth that Harry might still be alive. It's a great read for those who like a bit of mystery and drama in their fanfics.
In fanfiction, Harry could be believed to be dead for various reasons. It might be due to a powerful dark magic attack that seemed to extinguish his life force. Maybe he sacrificed himself to save others, like in many heroic tales. Or it could be a ruse created by him to deceive his enemies.
One common theme is the exploration of grief. Characters like Hermione and Ron go through intense emotional turmoil as they believe they've lost their best friend. Another theme is the revelation of hidden secrets. Often, as the story progresses, we find out that there were reasons behind Harry's faked death, like a secret mission or a plot to deceive the enemy.
His friends would be devastated. Hermione might be in deep shock and disbelief, constantly trying to find evidence that he's still alive. Ron would probably be angry and determined to find out what really happened.
One possible plot twist could be that Harry is actually in a magically induced coma rather than dead. Maybe a powerful dark spell was cast on him that made everyone believe he was dead, but a hidden ally discovers the truth and tries to revive him. Another twist could be that Harry faked his own death as part of a master plan to expose a great evil within the Triwizard Tournament. He could be secretly working behind the scenes to gather evidence and take down the real villains.
It could be a rogue Death Eater who infiltrated the Triwizard Tournament. This Death Eater might have seen Harry as a major threat to the return of Voldemort and decided to take matters into their own hands by faking his death. They could be using dark magic to cover their tracks and manipulate the events of the tournament.
I'm not entirely sure specifically as it's a rather unique and perhaps not widely known fanfic title. It could potentially be about Harry believing a baby has died in the context of a fan - created fictional story. Maybe it's set in a world where Harry is a character and there are some tragic events involving a baby.
Finding this specific fanfic could be quite a challenge. You could start by searching on popular fanfic websites like Archive of Our Own (AO3) or FanFiction.net. Use the exact title 'harry believed died baby fanfic' in the search bar and see if it comes up.
I'm not sure specifically about a 'Harry Circus Dead Lamia' fanfic. There are countless fanfics out there in the vast world of fan - created content, and it might be quite niche. You could try searching on popular fanfic websites like Archive of Our Own or Fanfiction.net using those keywords to see if it exists.