What are some interesting ideas for Supernatural 12x02 fanfiction?

One idea could be a crossover where the characters from both universes team up to fight a common supernatural threat that is a combination of demons from Supernatural and Downworlders from Shadowhunters. For example, a powerful demon has made a pact with a group of rogue vampires to take over both the human world and the Shadow World.

Perhaps a fanfiction where a character from The Raid has some sort of special ability like the characters in Supernatural. Maybe he can see ghosts or has some sort of psychic power. This new ability could help him during the Raid and also change his relationship with his team members. He might be seen as an outcast at first but later prove to be very valuable.

One idea could be exploring the backstories of the different bloodlines in more detail. For example, you could focus on a particular family within a bloodline and how they've been affected by the supernatural elements over generations. Another idea is to create a new character who is a hybrid of two different bloodlines and show their struggle to fit in or their unique powers.

One idea could be a crossover where Goku from DBZ ends up in the Supernatural universe and has to team up with the Winchester brothers to fight demons. He could use his ki blasts against the hordes of hell.

Maybe a fanfiction where a bagel shop in the Supernatural universe is a front for a secret society of hunters. The bagels there are made with ingredients that can ward off demons, and the story could revolve around the main characters uncovering this mystery.

One idea could be a character suddenly gaining supernatural powers and having to learn to control them while also dealing with the regular Supernatural threats. For example, a hunter who gets the power to see the future and has to figure out how to use it to prevent disasters in the hunting world.

One plot idea could be that the reader, an angel, is sent on a mission to redeem Lucifer. Along the way, they have many intense philosophical debates about good and evil, which gradually lead to an unexpected bond between them.

One interesting story could be about the characters facing an unexpected new villain. Maybe it involves a powerful demon that has a unique connection to Sam or Dean's past. It could add a whole new layer of mystery and danger to their adventures.

Well, in some Supernatural 13x17 fanfiction, there might be a plotline where a side character from that episode gets a more prominent role. For example, they could be the key to solving a mystery that was only hinted at in the actual episode. It could also be about how the events of 13x17 change the future trajectory of the characters' lives in ways that the show didn't explore.

One interesting aspect could be the character development. In fanfiction, writers often explore the characters' emotions more deeply. For example, they might delve into Dean's struggle with the Mark of Cain in new and creative ways. Another aspect is the different plot twists. Fanfic writers can take the basic premise of the episode and add their own unique spins, like introducing new supernatural creatures or alternative storylines for Sam and Dean's relationship.