I'm not sure specifically as I haven't read this particular fanfic. But generally, it might be about a character named Harry who is portrayed as the Angel of Death in the context of the Supernatural universe. Maybe it involves Harry having powers related to death, like being able to reap souls or having some sort of connection to the afterlife.
It's difficult to say precisely. But it might be a story where the idea of death is explored through the lens of the two fandoms. In 'Harry Potter', death has a certain set of rules and significance, and in 'Supernatural' there are different takes on the afterlife and death. This fanfic could be about a character's journey through death or their attempts to cheat it, using the unique elements from both the 'Harry Potter' and 'Supernatural' universes. It could also be a story about how the two different views of death in these universes collide or interact.
You could start by looking on popular fanfic websites such as Archive of Our Own (AO3). It has a large collection of Supernatural fanfics, and there's a good chance you'll find this one there.
A common theme is power and its consequences. Since Harry is the master of death, he has a great deal of power, and fanfics often explore how he uses or is tempted by it. Another theme is the blurring of boundaries between the known magical world in Harry Potter and the added supernatural elements.
😋If you like supernatural elements and suspense plots, I recommend the following two novels to you: " The Hardcover Yang Gas Tank of the Female Half-Fairy " and " I Have a Shop in the Underworld." The former told the story of a half-immortal with no conscience and a prison captain of unknown origins. It was full of elements such as ghosts and gods, good and evil, and dark reality. The latter was about a male protagonist who accidentally obtained a shop that traded with the dead and explored the mysterious world of supernatural powers in the city. I hope you like my recommendation.😗
You could try looking on popular fanfic websites such as Archive of Our Own (AO3). They have a large collection of fanfictions from various fandoms, including 'Harry Potter' and 'Supernatural' crossovers.
One popular 'Harry Potter Master of Death Supernatural Fanfic' is 'The Road to Mastery'. It has an interesting take on Harry's journey to become the master of death, incorporating some supernatural elements in a really engaging way.
I recommend "Aquamancer" to you. This is an urban supernatural novel written by the author, Chong Yang Spreading Wings. After the death of his girlfriend, the male protagonist awakened the ability to control water and began to pursue a legendary life. He saved someone and began to appreciate the wonderful moments of life. I hope you like this fairy's recommendation. Muah ~😗
😋I recommend "My Supreme Ability" to you. This is a modern ability novel. The protagonist's soul transmigrated into the ability world and became the son of a lowly servant. Later, through hard work and ability potential, he became an unprecedented Supreme Ability User. His special ability was to summon netherworld fire, which was one of the reasons why he was named "netherworld fire supreme". The plot of the novel was complicated, covering all kinds of clan disputes and feats. It was definitely not to be missed. I hope you like this fairy's recommendation. Muah ~😗