Instead of an Azoth sword, Kirei stabbed Tokiomi's behind with his penis. The truth of the Fourth War is that Gilgamesh is a girl, it's just that the audience are under an illusion just like the people of Britain were during Arthur's time. And Illyasviel was conceived through artificial insemination because Kiritsugu can't get it up for girls younger than himself.
"Gao Wu" is "high martial arts", with talking beasts
"Fantasy" is similar as above, but with immortality being real, and magic/alchemy/formations/etc.
"Xianxia" a tier higher, with inner worlds and massive scale
"Honghuang" where a hundred years is a nap, worldhopping is was easy as buying cigarettes, and "universal laws" or "conceptual powers" are toys