In a crossover, the Dragonborn's ability to absorb dragon souls could be related to the Halo universe in an interesting way. Maybe the dragon souls contain some sort of energy that can be used to power up Halo technology. The Dragonborn could team up with Halo scientists to study this. And the Spartans' training in various terrains could be combined with the knowledge of Skyrim's different regions. They could teach the Skyrim locals about new combat strategies, and in return, learn about the magic and lore of Skyrim.
Another way their abilities could be combined is through their senses. Zero has enhanced senses due to his nature. Kiryu also has sharp instincts from his years of fighting on the streets. They could use their combined senses to detect hidden enemies or traps. Zero's supernatural sense of smell or hearing could be used in conjunction with Kiryu's street - smart awareness to scope out dangerous situations and plan their attacks more effectively.
The Thu'um of the Dragonborn could be seen as a very powerful form of magic in Middle - earth. It might be on par with the most powerful spells of the wizards there. The stealth abilities of characters like Bilbo or Legolas could be enhanced in Skyrim with the use of Skyrim's unique stealth mechanics. And the strength of characters like Aragorn could be combined with the combat skills of the Nords in Skyrim.
The trainers in the Pokemon world might be able to use Kido spells if they are influenced by the Bleach world. They could combine these spells with their Pokemon's moves. For example, a trainer could use a binding Kido spell and then have their Pokemon attack the immobilized enemy. The Soul Reapers, in turn, could use Pokemon as mounts or partners in battle, enhancing their mobility and combat capabilities.
If we consider the abilities of Servants in Fate and Spartans in Halo, it's really interesting. Servants have magical powers like Gilgamesh's Gate of Babylon which can summon countless weapons. Spartans, on the other hand, have their advanced combat training and high - tech armor. In a crossover, a Servant's magic might be able to disrupt a Spartan's high - tech equipment. For example, a lightning - based magic attack could short - circuit some of the Spartan's systems.
In a crossover, Kakashi could be an interesting character to combine with the Halo universe. His Sharingan allows him to use various jutsu. If he were in the Halo universe, he could use his teleportation jutsu in combat situations. He could also use his knowledge of different ninjutsu to create new strategies against the Halo enemies. And perhaps he could teach some of the UNSC soldiers how to better sense their surroundings, similar to how he uses his Sharingan in Naruto.
When it comes to combining the lore, think about the magic systems. Skyrim has its own form of magic, and Enderal has a more complex and perhaps darker form. A character could be a mage who tries to learn both types of magic, which would be a great way to explore the differences and potential combinations. Another aspect is the history of the lands. Maybe there was a long - forgotten event that links the two worlds, and as the characters uncover it, they learn more about how their worlds are intertwined. This could also involve ancient ruins and lost civilizations that are common to both Skyrim and Enderal.
For example, the biotics in Mass Effect could be combined with the summons in Final Fantasy. A biotic user could enhance the power of a summoned creature like Ifrit. Or the tech abilities in Mass Effect could be used to upgrade the weapons in Final Fantasy. Garrus could help improve Cloud's Buster Sword with some advanced Mass Effect tech.
The Spartans' superhuman strength and advanced armor could be combined with GI Joe's stealth and infiltration skills. For example, a Spartan could provide cover fire while a GI Joe operative sneaks in to disable an enemy base's defenses.
The energy shields in Halo could be combined with the natural defenses of Pandora. For example, the Na'vi could use the technology to create shielded areas around their sacred places. Also, the UNSC's weaponry could be enhanced with the unique materials found on Pandora. The super - strong metals there could make Halo weapons even more durable.
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.