There are cases when a Griffin, a Monstrous Beast, reproduces with a mare, which would normally be its food. What’s born as a result from this is the Monstrous Beast known as a Hippogriff (ヒポグリフ, Hipogurifu?), which has the upper body of an eagle and the lower body of a horse. However, it is an impossible creature which normally should not exist. This is because it should be impossible for a child to be born between a Griffin and a horse, which are predator and prey respectively. The Hippogriff existed only as a hypothetical and philosophical symbol, and it is a "Phantasmal Beast" in the truest sense since its very existence is uncertain. It is inferior in rank to a Griffin from the Age of Gods.
Otherworldly Phantom HorseEdit
English | Japanese
"Show us your true power!"
Hippogriff: Otherworldly Phantom Horse (この世ならざる幻馬, Kono Yo Narazaru Maboroshi Ba?) is the favored mount used by Astolfo. Astolfo secured Hippogriff from the evil magus Atlante. Though his various legends tell of him riding on the backs of mounts like a Griffin and the famous Rabicano, the Hippogriff is particularly famous among them. A Hipppogriff appears in the story of "Orlando Furioso" (The Frenzy of Roland), where Astolfo and his comrades also appear. This story includes the theme of "The Hippogriff makes an appearance here, so no matter how strange it may seem, there is nothing that is truly impossible". In "Orlando Furioso", Astolfo even goes to the Moon with the Hippogriff in order to save Roland.
Astolfo claims that it boasts great speed, and its demolishing attack as it charges is equal to an A-rank physical attack, although that is not the real value of this mythical beast. The true power of the Hippogriff takes advantage of its "impossible existence" nature and amplify it, allowing it to perform short bursts of dimensional shift continually and only for an instant. That dimension is the home of the Phantasmal Species, where only beings that are purely non-physical souls can go to. It is the Reverse Side of the World, which the Hippogriff, when summoned as a Noble Phantasm, can never reach even if it can temporarily glimpse it. This feature allows both the mount and its rider to be non-observable and immune to damage for a very short period of time within this World by phasing through every single attack. However, it also drains mana rapidly, equal to that of an A-rank Noble Phantasm.
- ↑ 1.0 1.1 1.2
 Fate/Apocrypha material - Encyclopedia: Otherworldly Phantom Horse [Noble Phantasm], p.180-181 [T]
- ↑ 2.0 2.1 2.2 2.3
 Fate/Apocrypha material - STATUS: Rider of Black, p.024-025
 Fate/Apocrypha material - Encyclopedia: Rider of “Black” [Servant], p.163-164 [T]