Physically, he might gain new powers or abilities as mentioned before. But there could also be negative effects. His body could reject the foreign blood, leading to internal pain and weakness.
Perhaps in this fanfiction, Naruto is in a situation where he has no other source of sustenance. He could be trapped in a desolate place with no food or water, and the blood becomes a last - resort option for survival. This would be a very dark and extreme take on the character, as it goes against his usual values.
First, you need to study the two universes well. Know the rules of chakra in Naruto and the vampire lore in True Blood. Then, come up with a unique plot. Maybe a character from Naruto gets lost in the True Blood world or vice versa. Start with a strong opening that grabs the reader's attention.
I'm not sure specifically what that particular 'naruto acidic blood fanfiction' is about as there could be many different interpretations. It might be a fan - created story where Naruto has acidic blood, which could lead to all sorts of unique plotlines like his blood being a weapon or a hindrance in certain situations.
[Wood Leaf's Self Can Fuse with the Bloodline Limit: A special talent that can fuse all ninja bloodlines.]
Super Ninja System: Blood Succession Limit, Shura Eye, Shark Muscle, Psychic Spell, Tail Beast, and other unique skills.
"Treasure Chest Drop System": The boundaries of the Naruto Plane's bloodline: red eyes, crystallites, bone thinning, and other strange bloodlines.
[Carefree Saber God of Wood Leaf]: There was no blood inheritance limit, no blood inheritance elimination, and no Wood Escape.
[Naruto's Strongest Shock Escape]: Shock Escape Blood Succession Limit.
"Behind-the-scenes White-handed Beginnings from Muye": Seven Chakra Patterns of Wind, Fire, Thunder, Water, Earth, Yin and Yang.
As a Celestial Dragon, I became the most evil pirate! Collect all bloodline abilities, including the Eight Gates of Divination, Divine Might, Doppelganger Technique, etc.
"The Undeserved Wood Leaf": Not specifically mentioned.
"Plunder of the World's Creation", including Uchiha's name, Caged Bird, Immortal Body, Evil Ghost, Thunder Escape, Skeleton Vein, Ice Escape, Turbofan, and other blood inheritance limits.
"Start signing in from Naruto Hatake Kakashi." No details were mentioned.
[Taotie: Devour and Evolve from the Destruction of the Pillar]: Possesses all the boundaries of blood inheritance, ninjutsu, ninjutsu, fruits, etc.
The Counterattack of the Commoner Ninjas: No Blood Succession Limit.
[I am refining pills in Naruto]: No specific details were mentioned.
I hope you like this fairy's recommendation. Muah ~😗
One interesting Naruto and True Blood fanfiction could be where Naruto finds himself in the True Blood universe and has to deal with the vampires there. Maybe he uses his ninja skills to navigate the complex politics among the vampire clans. It's a unique crossover that combines the action - packed world of Naruto with the dark and mysterious world of True Blood.
Since I don't know the specific 'naruto acidic blood fanfiction', it's hard to say for sure. But most likely Naruto would be one of the main characters since it's in his name. There might also be his usual friends like Sasuke and Sakura who would be involved in the story due to their connection with Naruto.
Kakashi is another character that could be popular in 'naruto blood manipulation fanfiction'. His Sharingan and his intelligence could be combined with blood manipulation. For example, he could use his knowledge of the Sharingan to better understand the flow of blood in the body and develop new jutsus. Sakura, with her medical ninjutsu knowledge, could also be a major character. She might start exploring blood manipulation to enhance her healing abilities, perhaps finding a way to use it to revive the critically injured. And there's always the possibility of new original characters being created specifically for these fanfictions, with their own unique blood manipulation abilities.
I'm not entirely sure as it could be a very specific and perhaps fan - created concept. It might involve some sort of blood - related ritual in the Naruto universe involving a kami (which could be a god or a spiritual being in the Naruto lore). But without more context or having read it, it's hard to say precisely.
I'm not sure of a specific one titled exactly that, but you can search on fanfiction websites like FanFiction.net or Archive of Our Own. Look for tags like 'Naruto' and 'blood stained hands' to find relevant stories.