Another possibility is that it could be a well - known character from 'Game of Thrones' who somehow acquires this new power of the 'fist that twists'. For instance, Arya Stark could be an interesting choice. If she had this power, she could use it to further her vengeance or change the fate of her family and friends in unexpected ways.
It could be about a character who has a powerful or unique fist. Maybe this fist has some special ability that twists the events or destinies in the 'Game of Thrones' world. For example, it could be a magical fist that changes the outcome of battles or political intrigue.
A great plot twist would be if Arya's gag was part of a larger scheme by the Faceless Men. They could be testing her in a new and extreme way. Maybe they want to see if she can still carry out her assassinations without being able to speak or use her normal methods. This would put her skills and training to the ultimate test.
The Mother. In the existing lore, she is a major figure. In fanfiction, she could be more actively involved in the events of Westeros. She could be a guiding force, using her powers to heal the sick and wounded, and trying to prevent the bloodshed that is so common in the Game of Thrones world.
Well, it could be a character created by the fanfiction writer, perhaps a powerful mage who emerges from a long - forgotten land and claims god - like powers. This new god might bring a new set of rules and magic to the already complex world of Westeros.
Perhaps it could be a character like Bran Stark. He has the power of the Three - Eyed Raven, which gives him access to a vast amount of knowledge and some control over time and events. It's not a far stretch to think that he could develop into a Master of Death in a fanfiction.
A possible plot twist could be that a maester discovers a way to use steam power to bring the dead back to life in a more controlled way. This would completely upend the power dynamics in Westeros. The Night King would no longer be the sole controller of the undead, and different factions might try to use this new - found 'life - giving' power for their own gains, whether it's to replenish their armies or to use the undead as a workforce in the new industrial settings.
One key plot twist could be a character who was supposed to die in the original series surviving. For example, Ned Stark might avoid the beheading through some unforeseen event or the intervention of a new character. This would completely change the power dynamics in King's Landing.
A really interesting plot twist could be when Godzilla actually turns out to be a creation of the Three - Eyed Raven to fight the Night King. It completely changes the perception of Godzilla's role in the fanfiction.
A possible plot twist could be that the dragons in Game of Thrones are actually the result of some ancient ninja jutsu from Naruto's world. Maybe a long - ago ninja experimented with a powerful jutsu that created these creatures. Another twist could be that Jon Snow has some hidden ninja blood in him, which gives him unexpected powers and abilities that no one in Westeros has ever seen before.
One common plot twist is the unexpected rise to power of a minor character. In many fanfictions, a character who was overlooked in the original series suddenly gains a significant advantage, like a bastard son who discovers a hidden claim to a great house. Another is the resurrection of a major character in a different form, perhaps as a powerful undead with a new purpose. And sometimes, there's a plot twist where alliances are completely reversed, for example, sworn enemies becoming the closest of allies due to some unforeseen event or revelation.