Perhaps Bill Cipher enters Will's dreams and slowly manipulates his mind. As he 'gets' Will, he starts to change Will's perception of reality. Will, being a more innocent or naive character, might not realize what's happening at first. This could lead to a story where Will has to fight against Bill's control over his mind and soul, creating a tense and psychological plot.
One possible plot could be that Bill takes Mabel to his dimension. There, Mabel has to use her wits and creativity to outsmart Bill. Maybe she befriends some of the strange creatures in Bill's realm who help her in her escape plan.
In the 'bill cipher meets black hat fanfiction', it could start with Bill Cipher getting bored in his own dimension and decides to explore other realms. He stumbles upon Black Hat's domain. At first, Black Hat is hostile towards this strange triangular entity. But Bill Cipher, being his glib self, tries to convince Black Hat that they could achieve greater things together. Black Hat, seeing the potential of Bill's powers, reluctantly agrees. Then they embark on a journey of causing chaos across different universes, with each having their own motives hidden beneath their new - found partnership. Their interactions would be filled with mistrust and power plays as they constantly try to one - up each other while still maintaining their joint goals of destruction and domination.
One possible plot could be that Bill Cipher needs Will Cipher to complete a dark ritual. So, he devises a complex plan to capture Will. He might use his mind - bending powers to trick other characters into leading Will into a trap.
Dipper Pines could be one of the main characters. He might be the one who first discovers Bill's transformation and tries to figure out if it's a trick or if Bill is truly changing. His inquisitive nature would make him a great foil to Bill's new human self.
Well, one possible plot could be that Lincoln, being his curious self from 'The Loud House', stumbles upon a strange dimension where Bill Cipher exists. Bill, being his mischievous self, might try to trick Lincoln into making some wild deals. Maybe Lincoln has to find a way to outwit Bill to get back home to his family.
I'm not entirely sure specifically what that fanfiction is about. It could potentially be about Bill Cipher achieving or obtaining Will Cipher in some way, perhaps in a strange or otherworldly scenario within the context of the Gravity Falls universe. It might involve some sort of power play or a very unique plot device that only fans who have read it would know for sure.
One idea could be Bill Cipher getting trapped in a human form and having to navigate the strange world of human emotions and social norms. It would be a comical yet thought - provoking plot as he tries to understand things like friendship and love while still having his devious nature.
He could be a mysterious outsider. Just suddenly appear in the Naruto world and start causing trouble. Maybe he's looking for something in the Naruto universe, like a powerful chakra source or a special jutsu. And the ninja have to figure out who he is and what he wants before he destroys everything.
One idea could be Bill Cipher getting involved in a lemon - themed mystery. Maybe there are disappearing lemon groves in Gravity Falls and Bill is suspected, but it turns out to be a mislead and there's a strange lemon - loving creature causing the chaos. Another could be a love story where a character has a lemon - scented charm that attracts Bill in an unexpected way, leading to a wild adventure filled with Bill's usual mind - bending antics.
In 'bill cipher x mabel fanfiction', the plot device of the 'deal' is often used. Bill is known for making deals, and he might make one with Mabel. This could lead to all sorts of consequences and moral dilemmas for Mabel. Another common plot device is the 'alternate reality'. The fanfiction could take place in an alternate reality where Bill and Mabel have different relationships or roles. For example, they could be partners in crime in a world where chaos is the norm, or Mabel could be the only one who can see Bill and has to keep it a secret from everyone else.