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{{Infobox/Yu-Gi-Oh!/Episodeepisode | season image = 1Vrains 017.png | image name caption = Vrains 017 Preview[[Skye Zaizen|Blue Angel]] faces off against [[Prototype Red-B]].png | en_name = Blue's Back| kanji = 完全無欠のＡＩデュエリスト | ruby japanese ja_name = {{Ruby|完|かん}}{{Ruby|全|ぜん}}{{Ruby|無|む}}{{Ruby|欠|けつ}}の{{Ruby|Ａ|エー}}{{Ruby|Ｉ|アイ}}デュエリスト | romaji romaji_name = Kanzen Muketsu no Ēai Dyuerisuto | japanese translated ja_trans_name = Flawless AI Duelist | english series = Yu-Gi-Oh! VRAINS | japanese air date number = September 6, 201717 | english air date season = 1 | japanese opening ja_opening = [[With The Wind]] | english opening = | japanese ending ja_ending = [[Believe In Magic]] | english ending en_theme = Yu-Gi-Oh! VRAINS Main Theme | screenwriter = [[Atsushi Maekawa]] | director = [[Kimiharu Muto]] | storyboard artist storyboard_artist = [[Tsukasa Sunaga]] | animation director animation_director =

'''"Blue's Back"''', known as "'''Flawless AI Duelist'''" in the Japanese version, is the seventeenth episode of the ''[[Yu-Gi-Oh! VRAINS]]'' anime. It first aired in Japan on September 6, 2017. It , became available with official subtitles via Crunchyroll on the same day, and aired in Canada on October 27, 2018.

{{Episode summary|[[Aoi Skye Zaizen|Blue Angel]] rushes to [[Yusaku Fujiki|Playmaker]], who is having troubles against the AI programs. Thanks to her, Playmaker is able to get out of a pinch and reach the inner depths of the mother computer. However, when Playmaker reaches the data bank, a certain [[Akira Zaizen|character]] stands in his way...}}

== Featured Duels ==

=== Playmaker vs. Prototype AiGreen-A ==={{Duelprev|Featured Duel: Playmaker vs. Prototype AiGreen-A}} Playmaker has 4000 [[LP]] and controls no cards. Prototype Green-A has 3500 LP and controls "[[Tentacluster Nautilus]]" (0/↙↓↘) in the [[Extra Monster Zone]] and "[[Tentacluster Drillworm]]" (600/1200) in [[Defense Position]].

Playmaker activates [[activate]]s the [[effect ]] of "[[Dual Assembloom Assembwurm (anime)|Dual AssembloomAssembwurm]]" in his [[GY]], [[Banish|banishingbanish]]ing two other [[Cyberse]] monsters from his GY to [[Special Summon]] it, but its ATK becomes halved. He banishes "[[Linkslayer Dotscaper (anime)|LinkslayerDotscaper]]" and "[[Dot Scaper Linkslayer (anime)|Dot ScaperLinkslayer]]" in his GY to [[, and Special Summon]] with its ATK halved Summons "Dual Assembwurm" (2800 → 1400/1000). As "Dot ScaperDotscaper" was banished, Playmaker activates its effect to , Special Summon Summoning it (0/2100). Playmaker then activates the effect of [[Equip Spell]] "[[Cynet Defrag]]" in , [[pay]]ing half his LP to activate it from the GY(Playmaker: 4000 → 2000 LP), paying half his [[LPtarget]] to Special Summon 1 ing a [[Level ]] 4 or lower Cyberse monster in his GY and Special Summoning it in [[Defense Position and ]], then [[Equip|equippingequip]] ping "Cynet Defrag" to that monster (Playmaker: 4000 → 2000 LP)it. He targets, Special Summons , and equips "Cynet Defrag" to "[[Flick Clown (anime)|Flick Clown]]"(1000/1400). As Playmaker has no cards in his [[hand]], he activates the effect of "Flick Clown", paying 1000 LP to [[draw a card ]] (Playmaker: 2000 → 1000 LP).

At this point, Playmaker enters the [[Data Storm]]. As Playmaker 's LP is 1000 or less, he activates his his [[Skill]] "Storm Access", which allows him to randomly access accessing a card Cyberse [[Link Monster]] at random from a Data Storm when his LP is 1000 or lessa nearby Data Storm and adding it to his [[Extra Deck]]. Playmaker He obtains "Vector Square Scare Archfiend" and adds it to his [[Extra Deck]].

Playmaker uses [[Link Material|sets]] "Dual AssembloomDotscaper", "Dot ScaperDual Assembwurm" , and "Flick Clown" in the [[Link Arrow]]s to [[Link Summon]] "[[Vector Square Scare Archfiend (anime)|Vector Scare Archfiend]]" (2400/LINK-3/↙↑→) to the Extra Monster Zone. Playmaker then [[Normal Summons Summon]]s "[[Cyberse Wizard (anime)|Cyberse Wizard]]" (1800/800) . "Cyberse Wizard" [[attack]]s and [[destroy]]s "Drillworm", then "Vector Scare Archfiend" attacks and destroys "Nautilus" (Green-A: 3500 → 1100 LP). As "Vector Scare Archfiend" destroyed Green-A's monster by [[battle]], Playmaker activates its effect, [[Tribute|Tributing]] a monster to Special Summon the destroyed monster to Green-A's [[zone]] "Vector Scare Archfiend" [[points to]], then "Vector Scare Archfiend" can attack again in a row, on that monster. He Tributes "Cyberse Wizard", then Special Summons "Nautilus" to the bottomzone the top-left center Link Point Arrow of "Vector Square Scare Archfiend"points to. "Vector Scare Archfiend" attacks and destroys "Nautilus" (Green-A: 1100 → 0 LP).

"Cyberse Wizard" attacks and destroys "[[Tentacluster Drillworm]]" (600/1200). "Vector Square Archfiend" attacks and destroys "[[Tentacluster Nautilus]]" (0/LINK-3/↙↓↘) (Ai-A: 3500 → 1100 LP). Playmaker activates the effect of "Vector Square Archfiend", Tributing "Cyberse Wizard" to Special Summon "Nautilus" to the top Link Point of "Vector Square Archfiend", then allowing "Vector Square Archfiend" to attack again. "Vector Square Archfiend" attacks and destroys "Nautilus" (Ai-A: 1100 → 0 LP). === Blue Angel vs. Prototype AiRed-B ===[[File:Blue Angel VS Ai-B.png|left|thumb|220x220px]]

[[Skye Zaizen|Blue Angel activates ]] [[activate]]s the [[Field Spell Card|Field Spell]] "[[Trickstar Light Stage (anime)|Trickstar Light Stage]]". As it was activated, Blue Angel activates the effect of "Light Stage" to add 1 [[Add a card|adding]] a "[[Trickstar]]" [[monster ]] from her deck [[Main Deck|Deck]] to her [[hand]]. She adds "[[Trickstar Lilybell (anime)|Trickstar Lilybell]]" to her hand. As "Lilybell" was added to her Blue Angel's hand except by [[Draw a method other than card|drawing]] it, Blue Angel she activates its [[effect to ]], [[Special Summon ]]ing it (800/2000). Blue Angel then [[Normal Summons Summon]]s "[[Trickstar Candina (anime)|Trickstar Candina]]" (1800/400). As it "Candina" was Normal Summoned, Blue Angel activates its effect, adding a "Trickstar" card from her Deck to her hand. She adds "Trickstar Vision". Blue Angel [[Link Material|sets]] "Lilybell" and "Candina" in the [[Link Arrow]]s to [[Link Summon]] "[[Trickstar Holly Angel (anime)|Trickstar Holly Angel]]" (2000/↙↘) to the [[Extra Monster Zone]]. Blue Angel activates the [[Spell]] "[[Trickstar Vision]]", Special Summoning a "Trickstar" monster from her hand, but its [[ATK]] becomes halved, also it has its effects [[negate]]d, then each player draws a card. She Special Summons "[[Trickstar Narkissus (anime)|Trickstar Narkissus]]" (1000 → 500/1800), then both players draw a card. Blue Angel [[Set]]s a card. Blue Angel activates the effect of "Candina[[Trickstar Lycoris (anime)|Trickstar Lycoris]]" in her hand, [[reveal]]ing it, then [[target]]ing a different "Trickstar" monster she controls to Special Summon it, then [[return]] that monster to the hand. She targets "Narkissus", Special Summons "Lycoris" (1600/1200) to the [[zone]] the bottom-left Link Arrow of "Holly Angel" [[points to]], and returns "Narkissus" to her hand. Each time a "Trickstar" monster is Normal or Special Summoned to a zone "Holly Angel"points to, its effect inflicts 200 [[Effect damage|damage]] to add 1 [[Prototype Red-B|Red-B]] (Red-B: 4000 → 3800 [[LP]]). Each time a "Trickstar" card from her deck monster Blue Angel controls inflicts [[Battle damage|battle]] or effect damage to Red-B, the effect of "Light Stage" inflicts 200 damage to him (Red-B: 3800 → 3600 LP). As Red-B took effect damage, Blue Angel activates the effect of "Narkissus" in her hand, Special Summoning it (1000/1800). She adds an unknown cardSpecial Summons it in [[Defense Position]].

Blue Angel uses '''<u>Turn 2: Red-B</u>'''<br />Red-B draws. Each time a card is added to Red-B's hand, the effect of "CandinaLycoris" and inflicts 200 damage to him for each (Red-B: 3600 → 3400 → 3200 LP). As Red-B took damage by a "Trickstar"Lilybellmonster's effect, the effect of " to Link Summon Holly Angel"activates, increasing its ATK equal to the damage he took, until the end of this [[Trickstar Holly Angel turn]] (anime)|Trickstar "Holly Angel]]" (: 2000/LINK-2/↙↘→ 2200 ATK) to the Extra Monster Zone. Blue Angel Red-B activates the [[Continuous Spell Card ]] "[[Abyss Invitation]]". Red-B activates the effect of "[[Trickstar VisionTentacluster Darkwhip]]" in its hand, [[pay]]ing 500 LP to Special Summon it (100/500) (Red-B: 3200 → 2700 LP). Each time Red-B activates a "Trickstar" monster from her effect in his hand with its effects negated and ATK halvedor [[GY]], then causing both player the effect of "Narkissus" inflicts 200 damage to draw him immediately after it [[resolve]]s (Red-B: 2700 → 2500 → 2300 LP). As a player took 500 or less effect damage by the effect of another card. , the effect of "Abyss Invitation" activates, inflicting 200 damage to Blue Angel Special Summons "[[Trickstar Narkiss (animeBlue Angel: 4000 → 3800 → 3600 LP)|. As Red-B took damage by a "Trickstar Narkiss]]" monster's effect, the effect of "Holly Angel" activates, increasing its ATK equal to the damage he took, until the end of this turn (1000 "Holly Angel": 2200 → 500/18002400 ATK), draws, then subsequently Sets her drawn card. Blue Angel Red-B activates the effect of Spell "[[Trickstar Lycoris Machine Duplication (later anime)|Trickstar LycorisMachine Duplication]]" in her hand, revealing it, then targeting 1 "Trickstar" a [[Machine]] monster on her field he controls with 500 or less ATK and Special Summoning up to Special Summon "Lycoris" (1600/1200), then sending two monsters from his Deck with the targeted card back to her handsame name as that [[face-up]] monster. Blue Angel He targets "NarkissDarkwhip" and Special Summons two copies of "Darkwhip" (100/500). Red-B sets three copies of "LycorisDarkwhip" in the Link Arrows to the bottom-left Link Point of Summon "Holly Angel[[Tentacluster Nautilus]]"(0/↙↓↘) to the Extra Monster Zone. As "Nautilus" was Link Summoned, Red-B activates its effect, Special Summoning a "Trickstar[[Tentacluster]]" monster was from his hand to his zone "Nautilus" points to. He Special Summoned Summons "[[Tentacluster Blastsucker]]" (400/400) to a zone "Holly AngelNautilus" points to, its effect activates, inflicting 200 damage to Ai. Red-B. As Normal Summons "Blastsucker" (400/400) to a zone "TrickstarNautilus" monster inflicted effect damage points to Ai. Red-Bactivates the effect of "Nautilus", targeting all monsters it points to and destroying them. He targets two copies of "Blastsucker". As a Link Monster's effect is activated that targets the effect two copies of "Light StageBlastsucker" on the field, Red-B activatestheir effects, destroying them, then inflicting an additional 200 400 damage to Blue Angel (Ai-BBlue Angel: 4000 3600 → 3800 3200 → 3600 2800 LP). As Ai-B a player took 500 or less effect damageby the effect of another card, Blue Angel activates the effect of "NarkissAbyss Invitation" in her hand activates, inflicting 200 damage to Special Summon it Blue Angel (1000/1800Blue Angel: 2800 → 2600 → 2400 LP).

'''<u>Turn 2: AiRed-B</u>'''<br />Aiactivates the effect of "Blastsucker" in his GY, [[banish]]ing it to inflict 400 damage to Blue Angel (Blue Angel: 2400 → 2000 LP, Red-B draws: 2300 → 2100 → 1900 LP). As a player took 500 or less effect damage by the effect of another card(s) was added to Ai-B's hand, the effect of "LycorisAbyss Invitation" activates, dealing inflicting 200 damage for each card added, and "Light Stage" deals 200 more to Blue Angel (Ai-BBlue Angel: 3600 2000 → 3400 1800 → 3200 1600 → 1400 LP). As AiRed-B took damage from the effect of by a "Trickstar" monster's effect, the effect of "Holly Angel" activates, causing it to gain increasing its ATK equal to the damage taken he took, until the End Phase end of this turn ("Holly Angel": 2000 2400 → 2200 2600 ATK). AiRed-B activates the [[Continuous Spell Card]] effect of "[[Abyss Invitation]]". Ai-B then activates the effect of "[[Tentacluster Darkwhip]]Blastsucker" (100/500) in its handhis GY, paying 500 LP to Special Summon it banishing it to inflict 400 damage to Blue Angel (Ai-BBlue Angel: 3200 1400 → 2700 1000 LP). As a monster in Ai-B's hand activated its effect, the effect of "Narkiss" activates, dealing 200 damage after the effect resolves (AiRed-B: 2700 1900 → 1700 → 2500 1500 LP). As either a player took 500 or less effect damage, except by its own the effectof another card, the effect of "Abyss Invitation" activates, dealing inflicting 200 damage to Blue Angel (Blue Angel: 4000 1000 → 3800 800 → 600 → 400 LP). The effect of As Red-B took damage by a "Light StageTrickstar" activates (Ai-B: 2500 → 2300 LP)monster's effect, followed by the effect of "Holly Angel" activates, increasing its ATK equal to the damage he took, until the end of this turn ("Holly Angel": 2200 2600 → 2400 2800 ATK). Red-B activates the Continuous Spell "[[Flexible Tentacluster]]", then the and activates its effect , targeting one of his banished "Tentacluster" monsters and Special Summoning it in [[Attack Position]]. He targets and Special Summons "Abyss InvitationBlastsucker" (Blue Angel: 3800 → 3600 LP400/400). Ai"Blastsucker" [[attack]]s "Lycoris". As Red-B then 's monster declared an attack, Blue Angel activates the Spell Card her [[face-down]] [[Trap]] "[[Machine Duplication (later anime)|Machine DuplicationTrickstar Cascade]]" , returning a "Trickstar" card she controls to Special Summon two copies of a Machine monster with 500 or less ATK from its Deckthe hand to negate the attack. It Special Summons two more copies She returns "Light Stage" and negates the attack of "DarkwhipBlastsucker" (100/500 each).

Ai-A uses the three copies of '''<u>Turn 3: Blue Angel</u>'''<br />Blue Angel Normal Summons "Darkwhip" to Link Summon "[[Tentacluster Nautilus]]Candina" (01800/LINK-3/↙↓↘400) to the Extra Monster Zone. As "NautilusCandina" was Link Normal Summoned, AI-B Blue Angel activates its effect to Special Summon , adding a "[[Tentacluster]]Trickstar" monster card from its her Deck to her hand . She adds "Trickstar Temptation". Blue Angel sets "Narkissus" and "Lycoris" in the Link Arrows to a zone it points to. It Special Summons Link Summon "[[Tentacluster BlastsuckerTrickstar Black Catbat (anime)|Trickstar Black Catbat]]" (4002000/400←→) to the zone the bottom -left Link Point Arrow of "NautilusHolly Angel". Aipoints to (Red-B then Normal Summons : 1500 → 1300 LP). As a second copy of "Blastsucker" to player took 500 or less effect damage by the bottom-left Link Point effect of "Nautilus". Ai-B then activates another card, the effect of "NautilusAbyss Invitation"activates, inflicting 200 damage to target all monsters it points to and destroys themBlue Angel (Blue Angel: 400 → 200 LP). As Red-B took damage by a Link Monster"Trickstar" monster's that targets it on the field is activatedeffect, Ai-B activates the effect of "BlastsuckerHolly Angel"activates, destroying it increasing its ATK equal to inflict 400 the damage to Blue Angel he took, until the end of this turn (Blue "Holly Angel": 3600 2000 → 3200 LP2200 ATK). The As Red-B took damage by a "Trickstar" monster's effect, the effect of "Abyss InvitationBlack Catbat" then activates , reducing the ATK of all face-up monsters he controls by 200 for each monster "Black Catbat" points to, until the end of this turn. "Black Catbat" points to "Candina" (Blue Angel"Blastsucker": 3200 400 → 3000 LP200 ATK). The effect of As Blue Angel controls a "Trickstar" monster, she activates the [[Quick-Play Spell]] "[[Trickstar Temptation]]", targeting a monster on the field whose current ATK is different from its [[original ATK]] and returning it to the other hand. He targets and returns "Blastsucker" activates. "Holly Angel" attacks "Nautilus". Each turn, the first time Red-B would take battle damage from an attack involving his "Tentacluster" monster, followed by the effect of "Abyss InvitationFlexible Tentacluster" prevents him from taking it. The attack continues and "Nautilus" is destroyed. "Black Catbat" attacks Red-B [[Direct attack|directly]] (Blue AngelRed-B: 3000 1300 → 2600 → 2400 0 LP).

* [[Dot Scaper Dotscaper (anime)|Dot ScaperDotscaper]]* [[Dual Assembloom Assembwurm (anime)|Dual AssembloomAssembwurm]]* [[Flick Clown(anime)|Flick Clown]]* [[Linkslayer (anime)|Linkslayer]]

* ''[[Vector Square Scare Archfiend (anime)|Vector Scare Archfiend]]''

{{Decklist|Blue Angel (Aoi Skye Zaizen)

* [[Trickstar Candina (anime)|Trickstar Candina]]x2

* ''[[Trickstar Narkiss Narkissus (anime)|Trickstar NarkissNarkissus]]''

{{Decklist|Prototype AiGreen-A

{{Decklist|Prototype AiRed-B