One idea could be a story where Androssi and Baam are on a quest together in an uncharted level of the Tower. They face various challenges that force them to rely on each other's unique abilities. Baam's raw power and determination combined with Androssi's strategic mind and combat skills make them an unbeatable team.
One idea could be to have the characters from 'Throne of Glass' (TOG) and 'A Court of Thorns and Roses' (ACOTAR) meet in a magical realm created by a powerful ancient artifact. For example, Aelin from TOG could be on a quest to find a way to defeat a new, powerful enemy and accidentally stumbles into the world of ACOTAR. There, she meets Feyre and they initially have a bit of a clash due to their different upbringings and leadership styles, but then realize they can work together to solve a problem that threatens both of their worlds.
When writing an ACOTAR and TOG crossover fanfic, character development is key. You can't just throw the characters together without considering how they will grow and change in this new situation. For instance, if you pair up Chaol from TOG with Lucien from ACOTAR, think about how their different backgrounds and experiences will influence their relationship. Maybe Chaol's loyalty to his kingdom will be challenged by Lucien's more fluid view of loyalty among the fae. Also, don't be afraid to experiment with the magic systems. Try to find unique ways for the characters to use their combined powers. This will make your fanfic more engaging and original.
Good fanfic writing for a TOG and ACOTAR crossover requires a deep understanding of the source materials. Research the lore, the politics, and the relationships in both series. For the plot, think of something that challenges the characters from both worlds. A good way is to introduce a new, powerful enemy that neither world has faced before. In terms of character development, let the characters grow and change as a result of their interactions. For example, if Rowan from TOG meets Azriel from ACOTAR, they could learn from each other's combat skills and ways of thinking. Also, pay attention to the pacing of your story. Don't rush the important moments and build up the tension gradually.
Another plot twist could be that Baam loses his memory and Androssi has to convince him of who he really is. But in the process, she discovers some new aspects of Baam's past that she didn't know before. This could lead to a whole new arc in the fanfic, where they are both on a journey to rediscover Baam's identity and also uncover some secrets about the Tower in the process.
Perhaps a crossover where the magic systems cross over. The valg from 'tog' could somehow seep into the world of 'acotar' and the characters from 'acotar' have to learn about the valg and how to combat it using the knowledge that Aelin and her crew have from 'tog'. This could lead to some really interesting battles and alliances.
First, re - read both series to get a firm grasp on the characters, their personalities, and the worlds they inhabit. Then, decide on a central plot point that would bring the two worlds together. It could be as simple as a portal opening between the two realms. Next, choose which characters from each series will be your main focus. For example, you might want to start with Feyre and Celaena as they are strong female leads.
A very common storyline is their growth as individuals while still being connected. Baam is constantly evolving in power and understanding of the Tower, and Androssi has her own journey of self - discovery. Fanfiction might explore how their paths cross during these personal growth phases. Maybe Baam's newfound abilities help Androssi in a difficult situation, or vice versa. This can lead to a deepening of their bond.
Well, power - up themes are quite common. Koon and Baam are constantly growing in the original story, and in fanfictions, authors like to accelerate this process. They might gain new and unexpected powers. Also, loyalty is a big one. Their loyalty to each other can be tested in different ways, such as when faced with difficult choices that could potentially separate them. Then there's the theme of mystery. Writers may introduce new mysteries about the Tower that only Koon and Baam can solve together.