One possible motive could be revenge. The Freys have committed many heinous acts throughout the 'Game of Thrones' story, like the Red Wedding. Another character or group might have decided that enough was enough and that the only way to get justice was to put all the Freys to the sword.
It could also be a strategic move. Perhaps a powerful faction saw the Freys as a liability or a threat. By eliminating them all, they could gain more control over certain lands or resources. Also, the Freys were not well - liked by many, so it might be a way to gain support from those who despised them.
Another possibility is the Brotherhood Without Banners. They are known for their sense of justice and for punishing the wrongdoers. If they got wind of the Freys' many crimes, they could decide to put all of them to the sword to set an example in the cruel world of 'Game of Thrones'.
Maybe they believed that Hermione had some sort of special power even as a baby that could be both a danger and an asset. By kidnapping her, they could control and train her in a way that would benefit the fight against the Dark side. For example, if she was showing signs of extremely powerful magic at a young age, they may have wanted to ensure she used it for good from the start.
One possible motive could be that Sasuke has been consumed by his thirst for power. In the Naruto universe, Sasuke has often been shown to be willing to sacrifice a lot for power. In this fanfiction set in the Wave arc, perhaps he sees Sakura as an obstacle to his pursuit of power, either because she tries to stop him from following a dark path or he believes she will hold him back in some way.
One possible motive could be some sort of mind control. Maybe a powerful enemy has the ability to control Percy's actions and forces him to go after Artemis. This would add an element of tragedy as Percy would be acting against his will.
Survival could be a possible motive. The world of 'Game of Thrones' is full of threats. Maesters might conspire to ensure their own survival in the face of potential threats like the return of the Others or a large - scale war. They could be planning to manipulate events so that they are in a safe position, no matter who wins or loses in the power struggles. They might also be trying to protect the Citadel, their center of learning, and a conspiracy could be a way to secure its resources and continued existence.
In a 'Game of Thrones Afterlife' fanfic, the afterlife could be a place where different houses coexist in harmony or chaos. The Starks, Lannisters, and Targaryens could be engaged in a new kind of power struggle. This time, it's not about the Iron Throne but about something more ethereal, like control over the fates of the living. Their old rivalries and alliances might be re - evaluated and new relationships could form as they navigate this strange afterlife realm.
A 'Game of Thrones' future fanfic might explore the consequences of the events in the original series. For instance, if Jon Snow's true identity becomes widely known, how would that reshape the political landscape? Some might see him as the rightful heir and support his claim to the Iron Throne, while others might oppose him out of fear or self - interest. Also, the White Walkers' threat might not be fully over, and there could be a resurgence of the undead in a different form.
It could be related to a dark secret. Maybe the mama knew something about the killer that the killer didn't want anyone to find out. So, in order to keep that secret buried, the killer took the extreme step of killing her.
One possible motive could be his obsession with Will. Hannibal sees Will as a unique individual, almost like a kindred spirit in some ways. He might kidnap Will to have him all to himself, away from the outside world that he believes corrupts or misunderstands Will.
It could be due to mental instability. Maybe he has an undiagnosed mental disorder that causes him to act out in such a violent way.