Hey everyone. Wolfsun97 here with a unique concept for a new book idea. For the past couple of years as a fan of the Fate series, I have been toying with the idea of creating my own Grail war: the Black Grail War. The Black Grail is the source of all evil and can only grant dark wishes. Every one hundred years the Black Grail chooses a single human as it's represented as this person only holds hatred for the world and humanity.

In order to stop the Black Grail's activation, the counter force call forth seven people to become the Masters of Humanity who summon seven servants of the traditional seven classes to defend humanity. Meanwhile, the Black Grail's chosen master receives all thirteen Alters in Fate Grand Order as their servants (so, seven versus thirteen). The war takes place in a pocket dimension of the Black Grail's creation. Inside the dimension is the futuristic city with a red sky called Onyxfall. Battles only take place during the evenings where one servant from each side fight each other to death. The war takes place over a one to three week period and is overseen by a Ruler class servant to make sure that no one side tries to cheat the system.

The Black Grail's Chosen Master wins when all seven Masters of Humanity and their servants are defeated. If that happens, the Black Grail will activate and grant a wish of destruction and evil. However, if the Masters of Humanity win the war by defeating the Thirteen Alter servants, the Black Grail is transformed into a Lesser Grail and the surviving Master face off a short Holy Grail war in Onyxfall to decide a single victor.

So, as a quick review, in a Black Grail War:
1.) There are 21 servants
- seven servants of humanity with seven individual masters
- thirteen Alter servants with one single master blessed by the Black Grail itself
- one Ruler class servant to monitor the Black Grail war and the possible minor Holy Grail War That would take place in the event of multiple masters of humanity survive.
2.) The battles of the Black Grail war take place at night with one servant of humanity faces one of the servants of the Black Grail's chosen until one of the servants dies.
3.) The war ends when all the servants from on side (whether that be the seven servants of humanity or thirteen servants of the Black Grail's Chosen).

So,with all this being said, my question for you guys: do you guys think this is a good idea for a book? Again I've been toying with this idea for years now. I just want to know if you, the readers, would be interested in something like this. Let me know what you think in the comments below.