History FanFic / FateStayNightUltimateMaster

The fic is chronologically set after the event of season 1 from the ''Ultimate Alien'' perspective, but in an AlternateTimeline of the Fifth Holy Grail War from the ''Fate Stay Night'' perspective. It starts with [[WesternAnimation/{{Ben 10}} Ben Tennyson]] being sent in Japan by the Plumbers to investigate on [[FateZero the murders and "Gas leaks" that took place during the Great Fuyuki Fire]]. As he is visiting Fuyuki City, he ends up attacked by Lancer, then looking for souls to feed on. However, as a result of both a latent source of {{Mana}} he got from his Adonyte blood and a mysterious manipulation of the rules by an unknown source, Ben ends up being selected as a Eighth Master, with a female [[FateHollowAtaraxia Avenger]] (strongly hinted to be [[spoiler:JoanOfArc]]) as his Servant. Though initially disturbed, he decides to stay in order to ensure the Grail won't fail in wrong hands.

** At the beginning of the first chapter, Ben, while arriving to the city, read his report on the event at Fuyuki City, including a list of all Masters in FateZero and the various way their bodies were found (or, in Waver's case, not found.)

* BadassInANiceSuit: Avenger's civilian attire is similar to Saber's in FateZero, only with reversed colors (black blouse with white pants and jacket) and CoolShades.

* BloodlessCarnage: Averted, Ben's alien forms get more realistic injuries, often leading to AlienBlood.

* {{Expy}}: Avenger is one of Saber, sharing both a similar look, fighting style and part of her personality. Justified, since [[spoiler:her true identity is JoanOfArc, who is indeed an IdenticalStranger to Saber in the actual support. Plus, Ben being similar to Shirou in many ways, her acting with him like Saber does toward Shirou is logical.]]

* {{Fanservice}}: Avenger in pyjamas after taking a bath.

** Kevin asks for [=DVDs=] of "Japanese cartoons" from Ben. When reading the titles on the list, Ben immediatly is sure that said "cartoons" aren't suitable for kids...

* GoodIsNotDumb: While he can act a bit naive compared to other Masters on occasion, Ben mostly is portrayed in this fic as very GenreSavvy and fairly intelligent when the situation calls for it (in contrast to his [[Ben10Omniverse later portrayal]]). He keeps an eye on the Servants' stats regularly, usually picks the right form for each situation, suspects the Holy Grail might be a JerkassGenie and generally knows how to take advantage on his experience.

* HalfHumanHybrid: while he still lacks actual Anodyte powers, it's revealed that being 1/4 Anodyte still gave Ben a natural source of {{Mana}}, allowing him to provide Avenger with an acceptable amount of it.

--->'''Ben''' (sight): "Magic. I was never good at dealing with magic"

* TheStationsOfTheCanon: Played with. All three routes plus a bit of Hollow Ataraxia have been mixed; as a result, some scenes and events from the canon do happen, though most of them offscreen (since the story mostly follows Ben's perspective), and some of the scenes are changed; for example, the confrontation between Saber and Rider is interrupted by Ben and Avenger, and Zouken is able to summon True Assassin without being required to kill Sasaki Koujirou due to the twisting of the rules. The fight between Saber and Assassin from Fate, on the other hand, does happen and is identical to the original version, but has more important consequences (such as [[spoiler:leading to an interaction between Ben and Shirou]]).

* ThisIsReality: Played for laughs when Rin is thinking about Shirou's ideal and feeling consternated about it:

* ThouShaltNotKill: Ben is still recovering from his guilt about [[Ben10UltimateAlien almost killing Kevin at the end of season 1]], and as a result is extremely reluctant to rely on lethal methods, even in the Holy Grail War. He does compromise with the Servants, considering that since they are doomed to disappear anyway and are aware of the consequences, but he still refuses to kill the Masters. Of course, everyone around him other than [[WideEyedIdealist Shirou]] find this reasoning foolish and naïve.

* UnderestimatingBadassery: This is apparently the reason True Assassin failed to kill Ben; he underestimated Armodrillo's reflexes and Ben's ability to shapeshift and adapt to the situation. Notably, all characters are clear on the fact Ben got lucky and this won't happen a second time.

* WhatTheHellHero: Ben is infuriated when Avenger suggests him to track down and kill the Masters.

->'''Ben''': Oh come on, Avenger! I am fine! Honest!
->'''Avengers''': I will be the judge of that. Now, back the hotel! ''Now''!
->'''Ben''': Yes, ma'am...

* ShipTease: Much like Saber, Avenger insists on sleeping in the same room, and even in the same bed, as Ben. The difference is, much to Ben's embarrassment, she succeeds. If the narration describing his impressions is anything to go by, he isn't indifferent to her charms.

* HotChickInABadassSuit / BadassInANiceSuit: Avenger's civilian attire is similar to Saber's in FateZero, only with reversed colors (black blouse with white pants and jacket) and CoolShades.

* MrExposition: Avenger and Kotomine successively explain Ben to the way the Holy Grail works.

* TheJuggernaut: Berserker, when confronted by Ben; he brushes off Cannonbolt's charge like it's nothing, is barely injured by Ultimate Cannonbolt's charge, and still keeps advancing even when tortured by Echo Echo's sonic scream.

* AdaptationalVillainy: A minor example with Caster's original Master. In the source material, few details are given about him, but the reason Caster killed him for the first place apparently was due to him disrespecting her and constantly trying to humiliate her. In this version, he apparently tried to use his Command Spells to ''rape'' her. This could be a case of UnreliableNarrator, seeing how [[PlayingTheVictimCard Caster is the one narrating the tale]], but the canon establish Heroic Spirits cannot lie, so there has to be some truth in it.

* AdaptationalVillainy: A minor example with Caster's original Master. In the source material, few details are given about him, but the reason Caster killed him for the first place apparently was due to him disrespecting her and constantly trying to humiliate her. In this version, he apparently tried to use his Command Spells to ''rape'' her.
** Of course, it could also be a case of UnreliableNarrator; this is [[ManipulativeBitch Caster]] we are talking about, after all.

* MugglingTheMonster: At the beginning of the fic, Lancer tries to attack Ben in order to feed on his soul. He is extremely puzzled to see what he believed to be a harmless human teenager turn into an armored alien with fire abilities.

* ContinuityNod[=/=]: A lot to both series involved. Seeing how the story mainly focused on Fate/Stay Night, which always develops the characters' past a lot, that's not exactly surprising.

* ContinuityNod: A lot to both series involved. Seeing how the story mainly focused on Fate/Stay Night, which always develops the characters' past a lot, that's not exactly surprising.

** While Ben (and later [[spoiler:Paradox]]) are the only characters from Ben 10 to actually show up, Ben has many flashbacks about both his adventures and his friends; he mentions feeling guilt for almost killing Kevin, and tends to imagine what Gwen and Kevin would say when Avenger tries to sleep in the same bed than him.

* AdaptationalVillainy: A small example with Caster's original Master. In the source material, few details are given about him, but the reason Caster killed him for the first place apparently was due to him disrespecting her and constantly trying to humiliate her. In this version, he apparently tried to use his Command Spells to ''rape'' her.

* DidNotSeeThatComing: ''Nobody'' saw a eighth Master coming, even less Ben Tennyson. Not even Ben himself.

** UnderestimatingBadassery: This is apparently the reason True Assassin failed to kill Ben; he underestimated Armodrillo's reflexes and Ben's ability to shapeshift and adapt to the situation. Notably, all characters are clear on the fact Ben got lucky and this won't happen a second time.

The fic can be found [[http://www.fanfiction.net/s/6781336/1/FateStay-Night-Ultimate-Master here]]. Four chapters have been published so far, but apparently is on hiatus due to the author lacking internet until January 2013. Despite returning, the author shows no interest on continuing this fanfiction, whether it may result to becoming a DeadFic, putting this on permanent Hiatus, or replotting it due to [[spoiler:the appearance and the true identity of [[LightNovel/FateApocrypha Ruler]]]]. He did, however, recently confirmed the fic wasn't abandonned.

'''Fate Stay Night: Ultimate Master''' is a CrossOver {{Fanfic}} between FateStayNight and Ben10UltimateAlien written by Ten-Faced Paladin.

The fic is chronologically set after the event of season 1 from the Ultimate Alien perspective, but in an AlternateTimeline of the Fifth Holy Grail War from the Fate Stay Night perspective. It starts with [[WesternAnimation/{{Ben 10}} Ben Tennyson]] being sent in Japan by the Plumbers to investigate on [[FateZero the murders and "Gas leaks" that took place during the Great Fuyuki Fire]]. As he is visiting Fuyuki City, he ends up attacked by Lancer, then looking for souls to feed on. However, as a result of both a latent source of {{Mana}} he got from his Adonyte blood and a mysterious manipulation of the rules by an unknown source, Ben ends up being selected as a Eighth Master, with a female [[FateHollowAtaraxia Avenger]] (strongly hinted to be [[spoiler:JoanOfArc]]) as his Servant. Though initially disturbed, he decides to stay in order to ensure the Grail won't fail in wrong hands.