A plot could revolve around a dragon in Game of Thrones having similar characteristics to the dragons in Dark Souls. Maybe the Night King has some connection to the Abyss from Dark Souls. A character from Dark Souls could team up with Jon Snow to fight against the White Walkers. The Dark Souls character could introduce new ways of forging weapons and armor that are far more advanced than what is known in Westeros, giving the good guys an edge in the fight.
In a 'Game of Thrones Epilogue Fanfiction', it could be about the adventures of the next generation. The children of the main characters might discover new threats or mysteries. For instance, they could find hidden secrets about the White Walkers that were not fully explored in the original series, leading to a new quest.
Dark Souls has a deep lore regarding ancient and powerful artifacts. In a Game of Thrones fanfic, these could be translated into powerful weapons or items. For example, a sword that has the power to drain the life force of its enemies, similar to some weapons in Dark Souls. This would change the dynamics of battles and political intrigue in the Seven Kingdoms as characters would seek these powerful artifacts to gain an advantage.
Another approach could be to merge the magic systems. In Dark Souls, there are different types of magic like pyromancy and sorcery. Imagine if these were introduced into the Game of Thrones world. Maybe a pyromancer could influence the outcome of battles in Westeros in a new and unexpected way, or a sorcerer could use their illusions to deceive the power - hungry lords and ladies.
One possible plot could be Ron getting lost in the Seven Kingdoms. He'd have to use his wits and some of his basic magic skills to survive. Maybe he'd get involved with a group of rebels against a tyrannical king, using his knowledge of fighting dark forces from the wizarding world to help them.
One possible plot could be that Naruto characters are transported to the Game of Thrones world. Naruto, with his strong will and ninja skills, might get involved in the power struggles. He could form an alliance with some of the noble houses, perhaps using his Rasengan as a display of power to gain respect. The 'lemon' aspect could be a romantic sub - plot between Naruto and a GoT character, like Arya. They might have a secret relationship that adds an interesting dynamic to the overall story.
One possible plot could be that Draco Malfoy is magically sent to Westeros. He gets caught up in the power struggle between the Starks and the Lannisters. Maybe he tries to use his knowledge of magic to gain an advantage, but soon realizes that the politics of Westeros are far more complex than he expected.
One possible storyline could be a character from Dark Souls, like the Chosen Undead, finding themselves in the world of Game of Thrones. They might use their combat skills to survive in the brutal political and war - filled environment of Westeros. For example, facing off against the White Walkers with their unique Dark Souls weaponry.
One possible plot could be that a giantess emerges from the far North, beyond the Wall. She could be a remnant of an ancient race. The characters in the Game of Thrones world might initially see her as a threat. For example, the Night's Watch could fear she is allied with the White Walkers. But as the story unfolds, it turns out she has her own motives. Maybe she is seeking a lost relic that was stolen from her kind long ago. And she might form an unexpected alliance with a group of outcasts in Westeros to achieve her goal.
Perhaps Daenerys comes to Winterfell seeking refuge from the approaching White Walkers. The people of Winterfell are initially hesitant to welcome her, but as they see her determination to fight the common enemy, they start to accept her. Daenerys then discovers some ancient secrets in Winterfell's crypts that could potentially help in the battle against the undead. Her dragons also start to interact with the magical elements in the North in strange and unexpected ways.
Well, in this fanfiction, perhaps Naruto is initially mistaken for an enemy by the Dragon Queen. But as he shows his abilities like his Rasengan, she realizes his potential. They then form an alliance. Naruto starts to teach some of the Unsullied his ninja techniques for better combat. Daenerys, in return, shares her knowledge of ruling and politics with Naruto. And they journey across Westeros, with Naruto's speed and agility being a great asset in scouting and the Dragon Queen's dragons providing air superiority in battles.