-> ''Harry & Dudley flee an abusive Vernon - to Severus Snape. Severus finds a home for himself & the boys with dragons and hunt the Horcruxes from there. The dragons - especially one - become their allies. Tom R is VERY different.''
-->-- Summary on '''[=FanFiction.net=]'''

''3 Slytherin Marauders'' is an [[AlternateUniverseFic AU]] Franchise/HarryPotter fanfiction written by [[http://www.fanfiction.net/u/714311/severusphoenix severusphoenix]], found [[http://www.fanfiction.net/s/4923158/1/3-Slytherin-Marauders here]].

Petunia Dursley, Dudley Dursley, and Harry Potter leave 4 Privet Drive and -- after Petunia recovers from being shot -- take shelter on a dragon reserve, thanks to Severus Snape. With help from Lucius and Draco Malfoy, Rosmerta, Tom Riddle, ex-Auror [[OriginalCharacter Hugo Savage]] and a dragon named Yvane, they start hunting Voldemort's Horcruxes.
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!!3 Slytherin Marauders provides examples of:

* AbusiveParents: Vernon Dursley, like in canon. Unlike in canon, Petunia is ''not'' abusive.
* ActionGirl:
** Dora.
** Jennifer the Juggernaut.
** Rosemerta.
* AnimalStereotypes: Dora is a cheetah animagus, [[CunningLikeAFox Lucius is an arctic fox]], Harry is an osprey, Draco is a gyrefalcon, and [[OneWingedAngel Tom's is a black dragon.]] Dudley's patronus is a [[BearsAreBadNews bear.]]
* AssholeVictim: [[spoiler: Neville's uncle Algie.]]
* TheAtoner: Dudley and Petunia Dursley, Severus Snape, Lucius Malfoy, Tom Riddle, Aunt Marge.
* AwfulTruth: When confronted by Dora regarding his cover story Tom just can't bear to lie to her and tells her the truth about his origins.
* BadIsGoodAndGoodIsBad: [[spoiler: Tom]] is terribly embarrassed about being sorted into Gryffindor -- the house of "goodie-two shoes" and "cannon fodder".
* BadassFamily: Harry, Snape, Rosemerta, Dudley, Petunia, Lucius, Draco, Tom, Dora, Beth, and Victoria become one through adoption or marriage.
* BadCopIncompetentCop: Scrimgeour's faction of Aurors.
* TheBait: The Aurors have Lucius the "Death Eater traitor" spend a night in lockup in order to lure more Death Eaters out of the woodwork.
* BavarianFireDrill: [[WeNeedADistraction Draco throws a tantrum]] and Lucius demands the Ministry workers stop whatever they're doing and assist him so that Arthur Weasley can sneak in to find evidence that Rufus Scrimgeour and Dolores Umbridge are plotting to steal Harry away from his family.
* BearsAreBadNews: Dudley's patronus is a bear.
* BestFriendsInLaw: Snape and Lucius; Snape adopts Harry and Lucius marries Petunia and adopts Dudley.
* BigBrotherInstinct: Tom with Harry, Dudley, and Draco.
* BigNo: [[spoiler: Tom]] when he's sorted into Gryffindor. In a more dramatic example, Snape when Harry's name comes out of the Goblet of Fire.
* BitchInSheepsClothing: Dumbledore. He hides behind his "kindly old grandfather" persona but he dumped Harry at the Dursleys and [[spoiler: ''paid Vernon to abuse him'' so he can later swoop in and "rescue" Harry and indoctrinate him so that he will gladly die for the greater good.]]
* BondCreatures: The house elves. Also Yvane.
* BreakTheHaughty: Lucius while on the run from the Ministry.
* BullyingADragon: Literally, when a Death Eater attacks a dragon that befriended Harry. He got his JustDesserts (though the dragon later complained that he gave her indigestion).
* ByronicHero: Snape snarks that Sirius is just a poor "misunderstood Byronic Hero."
* CaptainObvious: In Chapter 116, Draco called Dudley that, prompting Dudley to call him "Lieutenant Sarcasm".
* CalvinBall: Harry, Dudley and some friends play water polo with a frisbee and rules thought up as they go along.
* CatsAreSnarkers: Seti.
* TheChessmaster: Lucius, Snape, Dumbledore, and Tom.
* ChickMagnet: Tom.
* ClonesArePeopleToo: Tom, who grows to become a very different person from his other self.
* ConvenientlyUnverifiableCoverStory: Snape and Lucius drop hints that [[LukeYouAreMyFather Tom is Voldemort's son.]] It's such a good lie that they've even got ''Voldemort'' believing it.
* CoolPet: Seti.
* CrazyJealousGuy: Tom hates it when someone flirts with Dora. She's just as bad when someone flirts with him.
* CunningLikeAFox: Lucius's animagus form is an arctic fox.
* CurbStompBattle: Dragons vs. dementors. Dragons win.
* DarkIsNotEvil: As demonstrated by Snape, Lucius, and Tom.
* DarkMistress: Mrs. Zabini becomes this (unwillingly) for Voldemort.
* DatingCatwoman: {{Lampshaded}} with Tom and Dora. She's an Auror-in-Training and he hails from a "dark family", and unknown to the wizarding world is an alternate copy of Voldemort himself.
* DeadpanSnarker: Snape, naturally.
* DeathByAdaptation: [[spoiler: Vernon, Uncle Algie, Theodore Nott]].
* DistressedDude: Harry. Frequently.
* DomesticAbuse: Vernon towards Harry, like in canon. And towards Petunia at times, unlike in canon.
* DoorStopper
* DrowningMySorrows: After learning the truth about the Dark Lord, Lucius gets very drunk... and stays that way for a very long time.
* {{Emo}}: Tom has his moments.
* EngineeredHeroics: Dumbledore. He's engineering a catastrophe when he leaves Harry with the Dursleys so he can "save" him later.
* EvilCounterpart: {{Inverted|Trope}} since Tom is Voldemort's Good Counterpart.
* ExactEavesdropping: Dora overhears Dumbledore and Moody's speculation that "Tom" is the Dark Lord's son.
* FanBoy[=/=]FanGirl: Dudley and Marge are big fans of ''Series/DoctorWho''.
* FreudianExcuse:
** [[spoiler: Tom was molested at the orphanage]].
** Lucius had a terrible relationship with his father.
* FutureMeScaresMe [=/=] EvilMeScaresMe: Tom is horrified when he learns what Voldemort has done.
* GoodIsNotDumb: Arthur Weasley thinks up a diversion that impresses ''Lucius Malfoy''.
* GraveMarkingScene: After venting about his [[ParentalAbandonment abandonment]] issues, Tom leaves flowers on his father's grave. Voldemort stumbles across the flowers and can't figure out who would give that S.O.B. flowers.
* GroinAttack: When her ex showed up and threatened Harry, Rosmerta hit him with a hex that does this.
* HappilyAdopted: Harry, Tom, and Beth by Snape and Rosemerta. And Lucius and Petunia get married so Dudley and Draco become step-brothers, and after finding her they adopt Lucius's daughter Victoria as well.
* HeWhoFightsMonsters: [[spoiler: Neville.]]
* HeelFaceTurn: Lucius Malfoy, after learning that the Dark Lord is a lying {{Hypocrite}}.
* HoldYourHippogriffs: Tom remarks that a lecture in History of Magic "set the kneazle among the jarveys".
* HoistByHisOwnPetard:
** Lucius covertly hexes Hermione for annoying him. He accidentally hexes himself as well.
** [[spoiler: Vernon]] gets himself killed via drunken road-rage.
* INeedAFreakingDrink: Lucius, on more than one occasion.
* IWantGrandkids: ''Voldemort'', of all people, when he learns of Tom's existence.
* IdenticalGrandson: Snape makes everyone (even Dumbledore) think that Tom Riddle is Voldemort's son to explain the resemblance.
* InferioritySuperiorityComplex: {{Lampshaded}} with Tom Riddle. When some of the Weasley clan meet Tom they assume him to be an arrogant, wealthy, pure-blood {{Jerkass}}. They later find out he grew up in an orphanage and is overcompensating.
* InsistentTerminology: Dumbledore and other members of the Hogwarts staff often uses words like "pranks" and "schoolboy spirits" for what normal people know as "bullying."
* {{Irony}}:
** Because of his desire to protect Harry, [[spoiler: Tom Riddle]] is sorted into Gryffindor.
** Because of his resentment and scheming Neville is sorted into Slytherin.
** Because Lucius Malfoy insists on [[EvilGloating gloating]] to Arthur Weasley, [[NiceJobFixingItVillain Arthur's bosses assume he must be very important and well-connected]].
* {{Jerkass}}: Mad-Eye Moody, Vernon Dursley and Sirius Black. Remus Lupin has shades of this as well.
* JustDesserts: [[spoiler: [=McNair=]]] learns too late why you don't meddle in the affairs of dragons...
* KnightTemplar:
** Albus Dumbledore. [[spoiler: He encouraged and ''paid for'' Vernon to abuse Harry in order to turn Harry into a weapon that would be completely loyal to him and would be okay with dying.]]
** Alice Longbottom. Neville inherited it.
** Rufus Scrimgeour.
* [[LikeFatherLikeSon Like Father, Like Daughter]]: [[spoiler: Lucius and Victoria.]]
* LiteralSplitPersonality: Voldemort and Tom Riddle, previously known as the diary Horcrux.
* LivingWithTheVillain: Tom with everyone. Though he's made a HeelFaceTurn it would still be ''very messy'' if his true BackStory was known.
* LongRunners: Started in 2009 and finally finished in 2015.
* LoopholeAbuse:
** The Goblins inform Tom that he can't ''completely'' empty out Voldemort's Gringott's vaults... so they leave him a single Knut.
** Fugitives can seek asylum at Gringott's because "Gringott's customers are allowed to count their gold for as long as they like."
* LukeYouAreMyFather: {{Exploited|Trope}} when Snape and Lucius pass off Tom as Voldemort's son. Later played straight when [[spoiler: Lucius discovers Victoria, a little girl that bears an uncanny resemblance to him.]]
* TheMentallyDisturbed: Sirius Black.
* MiscarriageOfJustice: [[spoiler: Scrimgeour throws Snape and Lucius into Azkaban without even charging them of any crime.]] One would think the Ministry would no longer try to do something like that after Sirius Black was cleared.
* MuggingTheMonster: Anyone who picks a fight with Tom.
* MustHaveCaffeine: Snape. As Harry says, "World's Best Father - After Three Cups Of Coffee".
* NoodleIncident:
--> ...[R]egistering one's [Animagus] form was really just [...] ensuring the wizard knew the magic well enough that ministry obliviators and curse breakers would not be summoned to a muggle's garden to deal with a partially transformed flamingo - one time of that was more than enough.
* OddFriendship: Tom with Percy Weasley and Hugo Savage.
* OneWingedAngel [=/=] ScaledUp: Tom's animagus form is a huge black dragon.
* OrphansOrdeal: Harry, Tom, Beth, and Victoria.
* OrphanageOfFear: Where [[spoiler: Tom]] grew up. Tom and Harry rescue Beth and Tori from one.
* PapaWolf: If you try and hurt Harry Snape will ''end you'' if Tom doesn't do it first. Lucius is the same for Draco [[spoiler: and Victoria]].
* ParentalAbandonment: Tom has these issues with his muggle father because as far as he knows his father just abandoned his mother for no reason. He also realizes that because his other self killed his father years ago he'll probably never know the full story.
* PityTheKidnapper: After Voldemort possesses Lockhart, Lockhart begins driving Voldemort (more) insane.
* ReadingsAreOffTheScale: Many older wizards recognize how powerful Tom is and find it a shame [[{{Irony}} he just wants to work at the Dragon Reserve library instead of changing the world.]]
* ReasonableAuthorityFigure: Hugo Savage.
* TheResenter: [[spoiler: Neville for Harry]].
* SmugSnake: Scrimgeour.
* SnarkyNonHumanSidekick: Yvane, Hazelette, and Seti.
* SparedByTheAdaptation: Tom, Dora.
* SpiritAdvisor: Yvane for Tom.
* TabloidMelodrama: it seems the staff of the Daily Prophet has nothing better to do than stalk an 11-year old boy.
* TalkingToTheDead: Harry and Snape visits James and Lily's graves at Godric's Hollow. Later Tom resolves some of his emotional issues after he visits and vents at his father's grave.
* {{Tsundere}}: Dora.
* UnknownRival: [[spoiler: Neville for Harry.]]
* WasItAllALie: Lucius loyally served the Dark Lord and believed in his cause. Then Lucius learns that the Dark Lord is a half-blood himself...
* WavingSignsAround: "FREE [[spoiler: SNAPE]]! FREE [[spoiler: MALFOY]]!"
* WeCanRuleTogether: Voldemort started making plans to get Tom under his thumb and accept his place as his heir from the moment he found out about his existence.
* WellDoneSonGuy: Lucius with his father Abraxas.
* WomanScorned: Fleur.
* WorthyOpponent: Lucius felt this way about Frank Longbottom.
* YouAreWhatYouHate: Voldemort is a half-blood himself. Rufus Scrimgeour, who is very suspicious of Slytherins, is a former Slytherin.
* [[YouGottaHaveBlueHair You Gotta Have Rainbow Hair]]: Dora.
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