Fate/Archive War
This Holy Grail War is not a fight for the omnipotent wishing machine, but a fight for the authority to "rewrite the records" of the "foundation of human nature."
The Holy Grail system is a collection of information from the quantum age of gods called "Akasha's Loom".
In Fuyuki City, a Holy Grail War called the "War for the Rights to Rewrite the Foundation of Humanity" suddenly started, turning the city into a huge "reality server." Shangguan Lingyun, who was forcibly involved, accidentally obtained the "developer" permission of the "Akasha Loom" system with the help of family relics.
While other Masters are still fighting according to the old rules, Shangguan Lingyun can already "see" the underlying code of the world, analyze the rules, lock loopholes, and even "complete" his incomplete servant - "Ba Yuqian" by hunting system derivatives.
With extraordinary calmness and resourcefulness, he took advantage of system bugs step by step, transforming from a passive chess piece of survival into a chess player with authority.
Interesting, very interesting