What are some interesting plot ideas for 'Fate Stay Night Another Holy Grail War Fanfiction'?

Another plot idea might be to have a twist where the Grail itself has been corrupted in a different way than in the original story. Maybe it's being influenced by an external dark force, causing the heroic spirits to act more erratically and forcing the masters to question the true purpose of the Grail War.

One interesting concept could be new Servant classes. Maybe there are unique combinations of skills and abilities that are different from the original classes in the regular Fate series. For example, a Servant with a blend of Assassin and Caster abilities, which would make for very stealthy and magically powerful combat strategies.

A Servant could be a famous inventor from history, like Nikola Tesla. His abilities could be related to electricity and innovation. He could create powerful electric fields or develop new weapons on the spot using his knowledge. Another unique Servant could be a mythical sea creature, like a Kraken. It could have the power to control water and summon other sea monsters to do its bidding.

Perhaps the story focuses on a previously unknown Master. This Master could be a young mage who accidentally stumbles upon the Grail War and has to quickly learn the ropes. They might form an unexpected bond with their Servant, like a Servant who is usually seen as cold-hearted but warms up to this inexperienced Master. This new dynamic could lead to a whole new set of adventures and challenges in the Grail War.

One could be a young female mage as the main character. She might be from a family that has been on the outskirts of the mage society and is trying to prove herself in the Grail War.

One interesting concept is alternative Servant summonings. For example, seeing a different class for a well - known character like if King Arthur was summoned as a Caster instead of a Saber. Another concept could be different Masters, perhaps a non - traditional or more morally ambiguous Master. And then there are the alternate storylines that might change the location or rules of the Holy Grail War.

Perhaps a character who is not a traditional mage but a normal human who has somehow been thrust into the Holy Grail War. This person could have an innate ability to nullify magic, which would make them a very interesting wildcard in the war. They might be able to form an alliance with a Servant who has a grudge against the magical system and together they could try to change the rules of the Holy Grail War.

A character from a non - mainstream mythology, like a deity from Inuit mythology. This would bring in a whole new set of powers and cultural elements. For example, a spirit with the ability to control ice and snow in ways that are unique to Inuit beliefs.

One idea could be introducing a new type of Servant, like a Servant from a different mythology not previously seen in the Grail Wars. This would bring in new powers and dynamics. Another could be having a master who is an ordinary person thrust into the war by accident and has to quickly learn the ropes. For example, a school student who stumbles upon the Grail War's secrets and has to fight to survive.

One interesting aspect could be the unique character reactions. For example, seeing how different Servants respond to the events of the Holy Grail War in ways that might deviate from the original storyline. It can also be fascinating to see how fanfic writers explore the relationships between characters in new and unexpected ways.