One feature is the crossovers between the two universes. In these fanfictions, characters from Naruto might find themselves in the Yu - Gi - Oh world or vice versa. And the use of bijuu decks in duels is a central aspect. These decks often have unique strategies based on the nature of the bijuu, like using the Nine - Tails' power for a really strong attack or the Shukaku's sand - based defenses in the Yu - Gi - Oh card game rules.
I'm not sure about a specific one, but you can look for fanfiction on platforms like FanFiction.net. There are likely many 'naruto yugioh bijuu deck fanfiction' there. You can search using relevant tags and read the reviews to find the good ones.
Another concept is new strategies. Fanfiction might introduce novel ways to use the cards in a deck. Maybe a deck that focuses on a combination of spell cards in a way that completely changes the flow of the duel. It could be something like using a series of trap - like spell cards that can disrupt the opponent's plans in unexpected ways.
In fanfiction, if Naruto is half - bijuu, it could mean he has enhanced physical abilities. For example, he might have greater strength and speed like a full - bijuu. His chakra reserves could also be much larger, allowing him to perform more powerful jutsu for longer periods.
In many Naruto fanfictions, if Naruto has three bijuu, they could be the Nine - Tails (Kurama) which he already has in the original series, perhaps the Eight - Tails (Gyuki) as it has a connection with Naruto's world and Akatsuki's hunt for the bijuu. And another could be the Three - Tails (Isobu). However, it really depends on the specific plot and creative direction of the fanfiction.
It could be an ancient sage. In Naruto lore, there are sages who have had a great influence on the world. An ancient sage could be the one who created or fathered the bijuu. Maybe he had some great power and knowledge that allowed him to bring the bijuu into existence.
First, you need to have a good understanding of the yugioh game mechanics. This includes how the cards work, the different types of cards (monsters, spells, traps), and the rules of dueling. Without this knowledge, it'll be hard to create a believable story.
In these fanfictions, a really cool concept is the idea of cross - faction decks. For instance, combining cards from different archetypes that wouldn't normally be used together in the official game. This can lead to some really exciting and unpredictable duels. Additionally, the concept of a deck that has a hidden power or ability that is only revealed under certain circumstances can make for a very engaging story.
It could be Shukaku. Since Shukaku was one of the first bijuu introduced in the series and has a sand - based power, it would be an interesting addition to Naruto's arsenal. Naruto's positive and energetic personality could also have an impact on Shukaku's usually grumpy and solitary nature.
Well, having two bijuu would likely make Naruto extremely powerful. He could potentially combine their unique chakra natures and abilities in combat. For example, if one bijuu has a fire - based ability and the other has a water - based one, he might be able to create new and unexpected jutsu by mixing them. Also, it would change his standing in the ninja world. People would probably be more in awe or more fearful of him, depending on their stance towards Naruto.