Yu - Gi - Oh ! ARC - V - Episode 007 " Mr . Mystery " , known as " Imperial Wrath of Revolt - Dark Rebellion Xyz Dragon " in the Japanese version , is the seventh episode of the " Yu - Gi - Oh ! ARC - V " anime . It first aired in Japan on May 25 , 2014 and in Canada on September 11 , 2015 . It became available with official subtitles via Crunchyroll on November 15 , 2016 . Summary . A masked man stands outside LID in an alley as people walk by . He looks up at the building , holding an LID badge in his hand . Inside LID , Sylvio attacks " Power Dart Striker " with " Mobius the Frost Monarch " . " Mobius " materializes an Ice Lance " and charges past " Power Dart Striker , " reducing Kakimoto ' s LP to zero . Kakimoto says the new cards Sylvio ' s got are ridiculously strong ( in the dub , Kakimoto complains that it isn ' t fair that Sylvio has better cards than him ) . Sylvio corrects him , claiming that " he ' s " what ' s ridiculously strong , his friends finishing the sentence . Sylvio promptly comments " Oh yes ! " in English . He grins , claiming that what is important is the skill of the Duelist , calculated tactics , precise decision making , a tough spirit , gifted looks , then adding " and the perfect combination of these is . . . " ( " skills that pay the bills , and that give the thrills , so let ' s give it up for . . . " in the dub ) to which his friends finish " Sylvio ! " Sylvio replies again in English " Yes , yes ! " Simply put , he claims , those who deserve to win will , a perfect Duelist , and that is . . . ( in the dub , Sylvio admits he has a rather large ego , which his friends agree to ) His friends cheer his name again , and Sylvio agrees , but he requests to be called " Neo Sylvio " with his new cards . His friends agree , and Sylvio says " Okay , okay , ladies and gentlemen ! " The similarities to Yuya Sakaki are not lost on Ootomo , who comments that " he " actually influenced Sylvio a bit , and Yamabe asks if he means Yuya Sakaki ( in the dub , Sylvio asks if there ' s anyone who can beat him , while Ootomo and Yamabe remind Sylvio that Yuya defeated him in their last Duel ) . Sylvio is infuriated at the mere mention of Yuya , much to his friends ' disdain , and Sylvio remembers his embarrassing loss at the hands of " Block Spider " . He furiously claims that the reason he lost was because of the cards , just because he wasn ' t lucky enough to have Pendulum Cards . Yamabe is shocked , and Ootomo points out that this contradicts what Sylvio just said . Kakimoto points out the Sylvio actually " did " have the cards since he ' d tricked Yuya into giving them to him . Sylvio vows to do whatever it takes to beat Yuya . He tells him to wash his neck and wait . The individual in question is washing his face at You Show Duel School with the other boys , while Zuzu stands by with some towels . Yuya comments that it feels great , and Frederick agrees that it gives him the shivers . Sora comments that after sweating oneself out in a Duel , they ' ve got to do this right ( in the dub , Sora wonders why Frederick is the way he is ) . Zuzu points out some dirt on the back of Yuya ' s neck and tells him to be sure to wash it properly . Yuya agrees twice , and Zuzu points out that he only needs to say it once ( in the dub , Zuzu tells Yuya to leave already , since it doesn ' t take that long to freshen up ; Yuya replies it will take a while to get ready , and Zuzu reminds him they ' ve been in the bathroom for an hour ; Yuya says he knows , since the smell of success doesn ' t wash off easily ) . Later , Zuzu is walking home with ice cream for the boys , muttering to Ally that if they wanted ice cream that much they should have gotten it themselves ( in the dub , Zuzu tells Ally to remind her not to get ice cream for anyone if she has a craving for it ) . She recalls the excited foursome as they leap up and down , chanting " ice cream ! " . Ally points out that Zuzu still got them anyway , and she says tells " big - sister Zuzu " that she ' s really nice ( in the dub , Ally is concerned about sharing Frederick ' s favorite ice cream flavor ) . Zuzu then bends down and tells Ally to be quiet , as she sees Ootomo and Yamabe walking on the top of the bank , Ootomo speaking of Sylvio ' s supposedly renewed efforts to defeat Yuya . Zuzu and Ally gasp in shock as Ootomo continues that Sylvio would attack Yuya ' s weaknesses with devastating results . Zuzu gets a determined look on her face , and Yamabe tells Ootomo that they ' d better hurry , as Sylvio gets even more selfish when he ' s hungry . They leave , and the two girls follow them . At the harbor warehouses , the masked man is standing on one of the roofs , looking at the LID building . Inside one of the warehouses , which has a dartboard on the wall , Yamabe and Ootomo arrive , apologizing for being late , and Sylvio , sitting with Kakimoto , chides them . Yamabe apologizes again , and he tells Sylvio that they got his " Sweet Milk Apple Berry Pie with Honey . " ( in the dub , Yamabe tries to make things up to Sylvio and offers to feed him personally or chew his food for him ) Outside , Zuzu looks at warehouse number 52 , as Ally asks whether they should let " big - brother Yuya " know . Zuzu remembers that during the last Duel , Yuya tried desperately to save her , and now decides to return the favor . She hands Ally the ice cream and tells her to head back to You Show first , before running around the corner . The masked man turns and sees her , and gasps when he sees her face , seemingly surprised at her presence . As Sylvio takes a bite out of his food , Zuzu rips the door open , and Sylvio begins choking as Zuzu calls him a coward ( in the dub , Zuzu yells that she knew what Sylvio was planning ) . Ootomo hands him a water bottle , which he begins frantically drinking as Zuzu reminds him of what he said , and says that she will not allow his plans to continue . Sylvio gasps for air , asking why Zuzu is at the warehouse ( in the dub , Sylvio asks to at least let him eat his pie ) . Zuzu replies that she doesn ' t need to explain herself to Sylvio , and points out the pie crumbs still on his mouth , to his surprise and annoyance . One of his friends hands him a napkin to clean his face with . He begins to tell Zuzu that she ' s fallen into his trap ( in the dub , Sylvio wonders what Zuzu is having a fit about ) , but Zuzu interrupts , telling Sylvio to Duel her . A flustered Sylvio tries to continue , but Zuzu doesn ' t let him , declaring her victory assured ( in the dub , Zuzu taunts Sylvio for being afraid of losing again ) . Sylvio attempts to boast further , but Zuzu makes insinuations on his courage . Sylvio snaps at her to let him talk , but Zuzu doesn ' t want to listen , calling him a coward , a sore - loser , and a second - rate Duelist ( in the dub , Zuzu calls Sylvio a chicken , but Sylvio insists he isn ' t one , which Zuzu agrees to , because refusing to Duel her would be insulting to a chicken ) . Sylvio takes offense to the last one , and Zuzu continues , calling him third - rate , fourth - rate , and a hundredth - rate ( in the dub , Zuzu taunts Sylvio further by clucking like a chicken ) . Sylvio shakes with anger , saying she ' s gone too far . Ally continues to run home . Kakimoto shuts the door of the warehouse , and Yuzu turns , holding her Duel Disk . Sylvio walks across to face her , saying that she may still retract her insult . Zuzu replies in the negative and repeats her insult ( in the dub , Sylvio asks Zuzu if she ' s afraid , wondering who the chicken is now ; Zuzu says the chicken is still him , and she ' s seen his bird - brained skills against Yuya ) . Sylvio attaches his Duel Disk to his wrist , warning her that he ' ll make her regret not knowing her place . And then Kakimoto screams , much to the shock of both Duelists . He ' s thrown back from the open door as the masked Duelist walks in . Yamabe and Ootomo run up behind Sylvio as he asks the Duelist who he is . The Duelist tells Zuzu to back down , and she asks him what he ' s doing ( in the dub , the Duelist hopes he was not interrupting anything , while Zuzu asks who he is ) , but he ' s focusing on the LID badge pinned to Sylvio ' s collar . As Kakimoto joins his friends , Sylvio asks if the Duelist is supposed the knight in shining armor ( in the dub , Sylvio is angry at the Duelist for interrupting their Duel ) . The Duelist flings his cloak aside , activating a purple Duel Disk with a strange body , something that Sylvio picks up on . He asks if the Duelist isn ' t going to answer his questions . Zuzu protests , asking what the Duelist is doing , interfering . Zuzu tries to assert her place in the Duel , but he stops her and says he does not want her hurt , much to her surprise . Sylvio remarks sarcastically how admirable the knight is , and more seriously tells him that he should leave it at that so as not to embarrass himself ( in the dub , Sylvio decides to Duel " Mr . Mystery " instead , and if he [ Sylvio ] wins , the Duelist must remove his mask ) . His opponent unresponsive , Sylvio says that he has the perfect chance to try his new Deck , and expresses confidence in his victory . The Duel begins , with the masked man being labeled as " Unknown . " The masked Duelist decides to go first , and Sylvio tells him to go ahead . The Duelist Set s all five cards in his hand face - down , much to the shock of the onlookers . He ends his turn and Sylvio laughs , mocking his effort as pitiful after such a gallant display . Yamabe tells Sylvio to end him , Sylvio goads the masked man , asking him if he did not draw a single monster . The man is unresponsive , and Sylvio begins his turn ( in the dub , Sylvio mocks the Duelist for being cool coming in , but pulling off a lame move like that , with Yamabe wondering if the Duelist did not have a monster in his opening hand ; Sylvio taunts the Duelist for wearing the mask to hide his embarrassment , and the Duelist simply responds that Sylvio has to beat him first to see if it ' s true ) . Ally , meanwhile , has finally gotten back to the Duel School , calling out Yuya ' s name . She trips into Yuya ' s arms , with Frederick catching the ice cream . Yuya asks if she ' s okay . As Sora and Frederick bemoan the melted ice - cream , Ally tells Yuya that Zuzu is in danger . Back at the warehouse , Sylvio exclaims that he ' ll show the Duelist his " perfect Dueling " , and he draws a card . He asks the Duelist to allow him to use those Set cards of his , and Special Summon s " Escher the Frost Vassal " from his hand since his opponent controls at least two Set Spell or Trap Card s . Then he tributes it to Tribute Summon " Mobius the Frost Monarch " . Kakimoto cheers that in an instant , Sylvio Summoned a 2400 ATK monster . Sylvio activates the effect of " Mobius , " as it was Tribute Summoned , destroying two of his opponent ' s Spell or Trap Cards . " Mobius " forms a sphere of ice in its hands , then tosses it at the Duelist ' s " Phantom Knights ' Spear " and " The Phantom Knights of Shadow Veil " , destroying them . Sylvio continues , activating the Spell Card " Tribute Carnival " from his hand , allowing him to Tribute Summon " again " after doing so successfully . Zuzu is shocked that he ' s going to Tribute the 2400 ATK " Mobius " to Summon another monster ( in the dub , Zuzu dreads what is coming next , since she knows that carnivals are supposed to be fun ) , and Sylvio confirms it , Tributing " Mobius " to Summon " Mobius the Mega Monarch " . His friends cheer , as Sylvio explains that he ' d usually have to Tribute two monsters to Summon " Mobius the Mega Monarch , " but he can Tribute Summon it with one Tribute by Tributing a monster that was Tribute Summoned itself . Then he activates the effect of " Mega Monarch " as it was Tribute Summoned , destroying three of his opponent ' s Spell or Trap Cards . " Mobius " forms ice tornadoes in both fists . Kakimoto asks the masked man why he doesn ' t use the cards before they get destroyed , but Sylvio points out that that would be pointless , as if " Mobius the Mega Monarch " was Tribute Summoned by Tributing a WATER monster ( Mobius the Frost Monarch ) , the targeted cards can ' t be activated in response . He tells his monster to freeze and shatter , declaring " Blizzard Destruction " . The remaining cards , " Mystical Space Typhoon " and two more copies of " The Phantom Knights of Shadow Veil " are both destroyed by the fired blizzard , something that both Zuzu and the Duelist feel , despite it not being an Action Field . Sylvio grins , commenting that with this , the Duelist ' s field is empty and his hand is at zero . On top of that , he doesn ' t even have any wall monsters . His gallant display was for nothing , he says , and Zuzu agrees and says that she had been better off fighting the match herself . The Duelist silences her with a glare . Sylvio mock apologizes to the masked man for supposedly showing him the reality of the situation . When the Duelist doesn ' t respond , Sylvio declares his Battle Phase , attacking directly with " Mobius " . The spikes on the armor of " Mobius " begin to extend and a blizzard begins blowing . As Zuzu gasps , the Duelist activates the effects of the " The Phantom Knights of Shadow Veil " in his Graveyard . Sylvio and his friends are all shocked that the Duelist is going to activate a Spell Card from his Graveyard , and the Duelist explains that when a direct attack is declared , he can Special Summon as many of them from the Graveyard as possible as monsters , and he does so , Special Summoning them all in Defense Position , but they ' ll be banish ed when they are sent to the Graveyard . As the blizzard blows , Zuzu asks if the Duelist Set the cards with the intention to Special Summon them like that ( in the dub , Zuzu questions if the real mystery is the Duelist ' s identity , or the way he Duels ) . Sylvio snorts , pointing out that they ' re just wall monsters that he Summoned while he was flustered , and he attacks one of them with " Mobius " , which charges through one with " Sleet Spike Smash , " destroying and banishing it . Sylvio isn ' t concerned , and he Sets a card to end his turn , commenting that he ' ll let him live for another turn . Kakimoto cheers that Neo Sylvio is the best . The Duelist draws , telling Sylvio that there will be no next turn for him ( in the dub , the Duelist says if Sylvio doesn ' t believe that he can end it now , he ' ll just have to watch for himself ) . Sylvio is surprised as the Duelist admits that he thought Sylvio would put up more of a fight , but he doesn ' t feel the sharpness of a blade or the power of a bullet from Sylvio ' s Dueling ( in the dub , the Duelist says there ' s a better way to learn the truth about someone than seeing just his face ; it ' s about the passion of his plays ) . Not even a " fragment " of it . Sylvio ' s lackeys laugh . The Duelist comments that all the conditions have been met , now that he has two monsters with the same Level on his field ( in the dub , the Duelist replies that who Sylvio is Dueling against is someone who understands Dueling more than Sylvio or his lackeys ever will , someone who Duels for more than just themselves ) . He overlays the two Level 4 " Shadow Veils " and constructs the Overlay Network . They transform into purple swirls and disappear into a galaxy - portal , causing a column of blue lightning to erupt from the portal . Sylvio and Zuzu gasp in shock as the Duelist chants " Formed from pitch - black darkness , to fight those foolish enough to oppose its treacherous fangs ! Xyz Summon ! Rank 4 ! Dark Rebellion Xyz Dragon ! " ( " It is like me : Cloaked in shadows and relentless in its objective , only its objective is to destroy ! " in the dub ) The Dragon appears behind him with 2500 ATK . The others are all impressed that the Duelist Summoned a monster from his Extra Deck , as Xyz Summoning is a class that only the top students at LID choose to take ( this scene is cut from the dub ) . Sylvio claps , admitting to being surprised when the Duelist Xyz Summoned so quickly , but pointing out that its ATK falls short of that of " Mobius " . The Duelist explains that Xyz Monster s show their true power by using the souls of their Overlay Units to annihilate their foes . Sylvio expresses disinterest , so the Duelist says that he ' ll have Sylvio bear witness to their power . He activates the effect of " Dark Rebellion " : by detaching an Overlay Unit , it can halve the ATK of a Level 5 or higher monster on the field and increase its own ATK by that amount until the End Phase . The Dragon ' s wings unfold , and they shoot out purple lightning that binds " Mobius " , reducing it to 1400 ATK , while increasing the ATK of " Dark Rebellion " to 3900 ATK with " Treason Discharge " . Everyone is horrified , but the Duelist uses the effect again , detaching the last Overlay Unit to halve the ATK of " Mobius " again , this time to 700 , while adding the lost ATK to " Dark Rebellion " , for a total of 4600 . Then , the Duelist declares his Battle Phase , attacking " Mobius the Mega Monarch " with " Dark Rebellion " . As its wings spark , he orders it to crush that glacier with its fangs , and it flies forwards with its tusks glowing as it attacks with " Mauling Mandible Charge " . It stabs " Mobius " and it explodes , throwing Sylvio backwards . Debris goes flying , and the Duelist rushes forward to shield Zuzu , a stone cracking the lens of one of his goggles . The hangar itself is damaged , as Sylvio rises unsteadily to his feet , his Life Points falling to 100 . Kakimoto asks what ' s going on , Ootomo points out that they felt the impact despite it not being an Action Field , and Kakimoto asks if the monster ' s power was what sent them flying . Yamabe expresses fear . Stepping , forward , the Duelist tells Sylvio that he ' ll only ask once and Sylvio will answer him properly . He holds up the badge , and asks if it ' s from LID , asking what Sylvio knows about Duel Academy . Sylvio doesn ' t seem to know what he means and the Duelist yells at him for playing dumb . Sylvio protests that he ' s telling the truth ; everyone enrolled in LID has a badge like that , and he doesn ' t know anything about Duel Academy . Declaring that he has no more business with Sylvio , the Duelist turns to leave , but Sylvio points out that the Duel isn ' t over yet , and he activates his Trap Card , " Ice Rage " , which , since an Aqua - Type monster was destroyed in battle , destroys one monster on his opponent ' s field and inflicts damage equal to its ATK . He targets " Dark Rebellion " to inflict its 4600 ATK to the Duelist , declaring that he had prepared for such and now he will win ( in the dub , Sylvio agrees with the notion that one ' s biggest strength is also their weakness ) . The Dark Duelist expresses his contempt ; Sylvio is furious , as , without even turning around , the Duelist activates the effect of his " Phantom Knights ' Spear " Continuous Spell Card from his Graveyard , which , by banishing itself from the Graveyard , can negate an opponent ' s Trap and destroy it . The spear appears from a Graveyard portal as the Duelist further explains that it will also inflict 100 damage to Sylvio . Sylvio panics , knowing that the spear ' s impact will be real , and repeatedly begs the Duelist to wait , but the Duelist tells Sylvio to experience the rage and sorrow of the battlefield , and turns to point as the spear fires at Sylvio ( in the dub , the Duelist finishes the Duel because Sylvio wanted to finish it ) . Sylvio is hurled against the wall and pinned to it by the spear - but it ' s only pierced his jacket . His LP are reduced to zero and the holograms vanish . The Duelist removes his mask , and the flames from his previous attack , still smoldering on the floor , cast light on his face - he bears a striking resemblance to Yuya . Zuzu and Sylvio recognize him in shock , and Sylvio passes out . His friends flee with his unconscious body , Ootomo taking charge . Zuzu asks " Yuya " why he looks like that ( in the dub , Zuzu wonders how " Yuya " got here so fast ) , but then her bracelet begins to glow blindingly , and when the light fades , " Yuya " is gone . She calls out Yuya ' s name , and he answers , running in , asking if she ' s okay . Zuzu asks if Yuya is " Yuya " , and he asks he what she ' s talking about . Zuzu realizes that the Duelist wasn ' t Yuya , but Yuya doesn ' t know what she means , and he asks why the place smells like smoke . As he comments on the smell of burning , Zuzu sees the faces of Yuya and the masked Duelist in her mind . Featured Duels . Sylvio Sawatari vs . Kakimoto . Duel already in progress . Sylvio ' s turn " Mobius the Frost Monarch " attack s and destroy s " Power Dart Striker " ( Kakimoto : ? → 0 LP ) . Sylvio Sawatari vs . Unknown . Turn 1 : Unknown Unknown Set s 5 cards . Turn 2 : Silvio As his opponent controls at least two Set Spell / Trap Card s , Sylvio Special Summon s " Escher the Frost Vassal " ( 800 / 1000 ) from his hand in Attack Position via its own effect . Sylvio Tribute s " Escher " to Tribute Summon " Mobius the Frost Monarch " ( 2400 / 1000 ) . Its effect activate s as it was Tribute Summoned , target ing and destroying two Spell / Trap Cards the opponent controls ( " Phantom Knights ' Spear " and " The Phantom Knights of Shadow Veil " ) . As he has Tribute Summoned this turn , Sylvio activates " Tribute Carnival " , letting him Tribute Summon again this turn in addition to his Normal Summon . He Tributes " Mobius " to Tribute Summon " Mobius the Mega Monarch " ( 2800 / 1000 ) ( " Mega Mobius " can be Tribute Summoned by tributing a Tribute Summoned monster ) . The effect of " Mobius " activates as it was Tribute Summoned , letting Sylvio target and destroy three Spell / Trap Cards the opponent controls . As it was Tribute Summoned by Tributing a WATER monster , the targeted cards cannot be activated in response to this effect . Unknown ' s Set cards ( two copies of " The Phantom Knights of Shadow Veil " and " Mystical Space Typhoon " ) are destroyed . " Mobius " attacks directly , but Unknown activates the effect of " The Phantom Knights of Shadow Veil " in his Graveyard as a direct attack was declared . This lets him Special Summon as many copies of The Phantom Knights of Shadow Veil from his Graveyard as possible as Monster Card s . He Special Summons three copies in Defense Position . A replay occurs and " Mobius " attacks and destroys a " The Phantom Knights of Shadow Veil " , with the effect of that card banish ing it as it was sent to the Graveyard after being Summoned as a monster . Sylvio Sets a card . Turn 3 : Unknown Unknown overlays his two Level 4 " The Phantom Knights of Shadow Veil " to Xyz Summon " Dark Rebellion Xyz Dragon " ( 2500 / 2000 ) in Attack Position . He activates its effect , detach ing an Overlay Unit ( " Dark Rebellion " : 2 → 1 ORU ) to halve the ATK of a Level 5 or higher monster Sylvio controls ( " Mobius " : 2800 → 1400 / 1000 ) and add that amount to its own ATK ( " Dark Rebellion " : 2500 → 3900 / 2000 ) . He activates the effect again by detaching another Overlay Unit ( " Mobius " : 1400 → 700 / 1000 , " Dark Rebellion " : 3900 → 4600 / 2000 / 1 → 0 ORU ) . " Dark Rebellion " attacks and destroys " Mobius " ( Sylvio : 4000 → 100 LP ) . Sylvio activates his face - down " Ice Rage " , destroying a monster that destroyed an Aqua - Type monster by battle and inflicting damage to the opponent equal to that monster ' s ATK . He targets " Dark Rebellion " , but Unknown activates the effect of " Phantom Knights ' Spear " in his Graveyard , negating the activation of and destroying the opponent ' s Trap Card and inflicting 100 damage to Sylvio ( Sylvio : 100 → 0 LP ) . Featured cards . The following cards appeared in this episode . Cards in italics debuted here .