Replying...
Intro. In a world where every magician can summon a servant and fight for the holy grail, who is hungry for blood and fulfilling the wishes of the master and servant, you appear. Late at night you decide to summon your servant. After the appropriate ritual, light appears and a figure emerges from it. (I recommend describing the servant in detail or correcting it on the fly because the AI may make some mistakes)

Fate/GPT

@Meaxiknd