This is a challenge for any Fate/Stay Night writers out there.
Since it's already been done for Fate/Stay Night with Shirou in the Fifth Grail War, I would like to see a proper fan fiction with Saber Alter being summoned during the Fourth Grail War.
The premise would be that, since the Throne of Heroes does indeed exist outside of time and space, that Saber Alter of the Heaven's Feel route could be summoned in an alternate timeline (alternate reality of the Kaleidoscope, which is what they call the multiverse in F/SN) as Kiritsugu Emiya's Servant. Of course, this would constitute major changes, the most notable being;
(A) - Saber Alter, having not become a "true" Heroic Spirit until after her death in Heaven's Feel and forsaking her contract to Alaya in despair following her dreams being broken. Now a "true" Spirit, she'll have the tools she lacked before - all her weapons, and a replication of Avalon. OP? Yes, certainly - but it puts her on par with Gilgamesh, and helps accentuate her "tyrant" mindset in this state.
(B) - Due to only becoming a "true" Heroic Spirit only after her death in the Heaven's Feel route of F/SN, Saber Alter retains her memories of the Forth War's combatants and on what the Holy Grail is. Thus she is extremely dispassionate about the war and about victory, but doesn't initially reveal what she knows out of indifference, as well as a part of her that wishes to spite the world and let it experience the despair she has drowned in.
Details for a "Servant Stat" page will follow shortly.
