Ruby's scythe - wielding skills could be enhanced with Assassin's Creed combat techniques. Her speed could be used to quickly assassinate enemies in close combat. Weiss could use her glyphs in combination with Assassin stealth, for example, creating invisible platforms to move around undetected.
Blake's shadow clones could be a great addition to the Assassin's arsenal. She could send out clones to distract enemies while she sneaks up on them like an Assassin. Yang's strength could be combined with the brute force attacks of the Assassins. She could break through enemy defenses more easily and then use Assassin - style finishing moves. The characters from RWBY and Assassin's Creed could also exchange knowledge about different forms of combat and adapt to each other's fighting styles, making them more versatile in battle.
Ruby would be thrilled. She loves exploring new worlds and the Assassin's Creed universe offers that. She'd be excited to learn about the different assassin orders and their techniques. Weiss would approach it with a discerning eye. She'd look for the quality of the writing, the development of the characters. Blake would find the Assassin's Creed fanfiction interesting as it may touch on themes of secrecy and mystery which she can relate to. Yang would be all about the action. The fight scenes in the fanfiction would be her favorite part, and she'd be rooting for the assassins.
Well, Naruto's ability to use chakra and perform jutsu like the Rasengan could be combined with an Assassin's stealth and parkour skills. For example, an Assassin could use chakra to enhance their speed and jumps while Naruto could learn to be more stealthy using Assassin techniques.
The telepathic abilities of some Star Trek species, like the Betazoids, could blend interestingly with the mind - related magic in Lotr. For example, a Betazoid could potentially communicate with wizards or other magically - attuned characters in Middle - earth on a different level. Also, the transporter technology in Star Trek could have a strange interaction with the magical portals or teleportation - like spells in Lotr.
Ruby would likely be enthusiastic. The Assassin's Creed fanfiction might remind her of her own quests in Remnant. She'd be eager to share her thoughts on the different assassins and their abilities. Weiss would look at it from an academic perspective, perhaps commenting on the use of language and the overall structure of the story. Blake may draw connections between the hidden blades of the assassins and her own weapon. Yang would enjoy the more intense fight scenes and might even wish she could participate in those battles.
Naruto's shadow clone jutsu would have new applications. Instead of just using it for combat in his own world, in Assassin's Creed 3's setting, he could use the clones for gathering information. The clones could blend in with the crowds in cities like Boston or New York in the game. Also, his Rasengan, which is a powerful attack in his world, could be modified. Maybe he could use chakra control to make it more like a stealth weapon, for example, by making it a smaller, more concentrated blast that can be used to silently take out enemies from a distance.
Well, Naruto's Rasengan could be combined with Ruby's Crescent Rose. For example, Ruby could use the spinning force of the Rasengan and incorporate it into her scythe attacks. It would add a new level of power and unpredictability. Sasuke's Chidori could be used in a similar way, perhaps with Weiss' Glyphs. She could create Glyphs that enhance and direct the power of the Chidori for more precise attacks. And Naruto's shadow clones could be used in RWBY battles. They could be used to distract Grimm while the RWBY characters set up more powerful attacks.
In Skyrim, the Greybeards have a unique connection to the Thu'um, which is a powerful form of voice - based magic. If they were in Game of Thrones, they could use the Thu'um to influence people on a large scale, similar to how the Red Woman uses her magic to manipulate others. Also, the werewolves in Skyrim could add a new type of creature to the already diverse bestiary of Game of Thrones. Their lycanthropy could be a source of both power and fear, and how the people of Westeros would react to such a thing would be really interesting to explore.
Sailor Moon's ability to heal with her Moon Stick could be used in the wizarding world to counteract some of the dark curses. Harry's ability to resist the Imperius Curse might be related to the Sailor Scouts' strong willpower. Hermione's vast knowledge of magic could be combined with Sailor Mercury's intelligence to solve complex magical problems. For example, they could figure out a way to break through a magical barrier that was created by a combination of dark magic and the power of a Sailor Moon villain.
Natsu's fire - eating ability would be really unique in the MLP world. He could use his fire magic in a way that might be both fascinating and a bit scary to the ponies. Maybe he could use it to help with things like heating during cold winters in Ponyville. His hot - headed nature might also get him into some funny situations with the more calm and collected ponies.
The Assassins, being trained in combat and stealth, would initially be a bit skeptical of the demigods' powers. For example, Ezio might be quite surprised when he sees Percy control water to put out a fire in a narrow alley during a fight. On the other hand, the demigods would be fascinated by the Assassins' gadgets and skills. Annabeth might be very interested in the Assassins' hidden blade mechanism and try to figure out how it works. They would learn from each other, with the Assassins teaching the demigods about urban warfare and the demigods showing the Assassins how to use their powers more effectively in combat.