The Counter Force, the world's defense mechanism.
It consisted of Alaya, the collective unconscious of humanity, and Gaia, the will of the planet. The former pursued the continuation of human civilization as its absolute goal, even at the cost of eroding the planet's ecology; the latter upheld Earth's ecosystem as its fundamental principle, sacrificing human civilization if necessary.
When Alaya was strong, the world line headed in the direction of Fate; when Alaya was weak, Dead Apostles walked the earth, and the world line headed toward Heaven's Tsukihime.
Both granted individuals temporary power through "equivalent contracts" to eliminate threats. The price was that, after death, the contractors' souls would be conscripted as mindless tools, such as Alaya's Guardians or Gaia's True Ancestors.
Perhaps because of some particular fetish shared by the humans of this world, the Counter Force's Guardians were all dark-skinned, white-haired Heroic Spirits, such as Kiritsugu Emiya, Shirou Emiya, and Okita Souji Alter—
—So why exactly was I summoned here this time? Emiya Assassin could not figure it out.
"You're me?" Kiritsugu Emiya felt considerable pressure. Now he finally understood why this fellow had been looking at his wife so strangely.
"Don't look at me like that. In my life, I never married into the Einzbern Family." After saying that, Emiya Assassin fell silent, looking as though he were contemplating his existence.
"I can't believe you never noticed, Kiritsugu. You're so slow." Jaguar Man laughed and slapped Kiritsugu Emiya hard on the back.
Two dads? Shirou Emiya was dumbfounded too. He had only learned Projection Magecraft and Reinforcement Magecraft from Kiritsugu Emiya, and even the method of using Magic Circuits he had been taught was wrong. He had absolutely no idea what the Holy Grail War was.
But speaking of Kiritsugu Emiya teaching him the wrong way to