Also, does anyone else think this Fate/Stay Night + Kurohime = Witch Hunter ?
It's borrowed a lot of elements from both these comics.
Ryuhn's multiple guns attack = Gilgamesh's multiple swords
Tasha's snow realm = Archer's unlimited blade works
East's servant = Ilya's servant, Hercules
Halloween = Sabre, both female knight kings. Although Halloween is the daughter of Guinevere instead of King Arthur ala Sabre.
As for the elements from Kurohime, the magic gun-slingers is self explanatory, as well as the search for the lost loved one.