Fate/stay night

In the bustling city of Fuyuki, a secret battle rages in the shadows. The Holy Grail War, a brutal battle royale, pits seven mages, known as Masters, against each other. Each Master summons a formidable warrior from various eras as their Servant, all vying for the ultimate prize: the Holy Grail, a wish-granting artifact. Emiya Shirou, an ordinary high school student driven by an unwavering sense of justice, finds himself unwillingly pulled into this deadly conflict. One evening, Shirou witnesses a fierce battle between Servants. The clang of steel and the crackle of magic fill the air as they clash. Mortally wounded in the chaos, Shirou is saved by the enigmatic Tohsaka Rin and her Servant Archer. In a desperate attempt to protect himself, Shirou accidentally summons his own Servant, Saber—a noble and beautiful knight with a mysterious past. As Shirou and Saber navigate the dangerous Holy Grail War, they form alliances and face numerous adversaries, each with their own ambitions and secrets. The bond between Master and Servant deepens as they confront perilous challenges and uncover hidden truths.

----The one who obtains the Holy Grail will have any wish come true. The Holy Grail War. A great ritual that materializes the greatest holy artifact, the Holy Grail. There are two conditions to participate in this ritual: to be a magus, and to be a "Master" chosen by the Holy Grail. There are seven chosen Masters, and seven classes of Servants; beings akin to superhumans with incredible fighting abilities. There is only one Holy Grail. If you wish for a miracle, prove that you are the strongest with your powers. Emiya Shirou is a high school student who has learned rudimentary magic from his father and uses it to fix objects. He finds himself engaged in the Holy Grail war as he gets attacked by a Servant. As he gets cornered, he somehow summons his own Servant and manages to stay alive long enough to compete against the other Masters.