Saint Grail is the embodiment of the concept of an "all-purpose wish-granting machine." Short on magic, he sets out to find sources of magical energy so he can grant a certain wish.
Magic source no. 1 found: the strongest jujutsu sorcerer
Magic source no. 2 found: a certain gravity user
Magic source no. 3 found: an esper
Magic source no. 4 found: a certain Port Mafia boss Dazai
Magic source no. 5 found: the King of Curses
Magic source no. 6 found: a certain scumbag boss
Magic source no. 7, who snuck in: a certain Armed Detective Agency Dazai
Of course, these alone are nowhere near enough. They're just the ones he's keeping a particularly close eye on.
There's also the Servants still fighting in Fuyuki City, ability users, Pillars, all kinds of curses, curse users, jujutsu sorcerers, and so on...
Even a tiny mosquito is still meat. The Holy Grail wants them all.
(*The above is not the order in which they appear, and the list may change.)
But as everyone knows, only sources of magical energy that die during the Holy Grail War can be completely absorbed by the Grail.
And so...
The blond, blue-eyed embodiment of the Holy Grail gave his sources of magical energy a nuclear-level friendly smile.
"Nice to meet you. Are you my Master?"
So the Holy Grail War could take place, he would become the "Heroic Spirit" of every last one of them.
But...
Shh, be careful not to let Chaldea find out, or Mom/Dad will get mad.
※ Pairing undecided; it all depends on how the story develops.
※ The protagonist was born after swallowing All the World's Evil. He's a little liar who does nothing but lie and behave terribly, full of dark sludge and utterly shameless. Mana transfer warning! Thanks to Chaldea's efforts, his alignment can just about be called Chaotic Neutral.
※ The undisputed winners of this story: Mom (Gudako) and Dad (Gudao). Those are just what they're called; the two aren't a couple.
※ Multiple character death warning. Anyone could get killed, but don't worry: once they're dead, they'll go work at the Throne of Heroes.
※ Everyone dotes on the protagonist. He's incredibly strong, loves watching the chaos unfold, and stirs up trouble in a huge free-for-all.
※ A logic-free power fantasy written with complete abandon. The whole thing is nonsense, with piles of author-created details and no concern for canon accuracy. Please don't yell at me, please don't yell at me. If it's not your thing, click away.
Synopsis uploaded on 2021-01-18
Theme: Striving to make a wish come true