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{{Unreleased content}}{{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 will air first aired in Japan on September 6, 2017, 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 Green-A==={{Duelprev|Featured Duel: Playmaker vs. Prototype Green-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]]. '''<u>Turn 2: Playmaker</u>'''<br />Playmaker [[activate]]s the [[effect]] of "[[Dual Assembwurm (anime)|Dual Assembwurm]]" in his [[GY]], [[banish]]ing two other [[Cyberse]] monsters from his GY to [[Special Summon]] it, but its ATK becomes halved. He banishes "[[Dotscaper (anime)|Dotscaper]]" and "[[Linkslayer (anime)|Linkslayer]]", and Special Summons "Dual Assembwurm" (2800 → 1400/1000). As "Dotscaper" was banished, Playmaker activates its effect, Special Summoning it (0/2100). Playmaker activates the [[Equip Spell]] "[[Cynet Defrag]]", [[pay]]ing half his LP to activate it from the GY (Playmaker: 4000 → 2000 LP), [[target]]ing a [[Level]] 4 or lower Cyberse monster in his GY and Special Summoning it in [[Defense Position]], then [[equip]]ping "Cynet Defrag" to 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 [[Skill]] "Storm Access", accessing a Cyberse [[Link Monster]] at random from a nearby Data Storm and adding it to his [[Extra Deck]]. He obtains "Vector Scare Archfiend" and adds it to his Extra Deck. Playmaker [[Link Material|sets]] "Dotscaper", "Dual Assembwurm", and "Flick Clown" in the [[Link Arrow]]s to [[Link Summon]] "[[Vector Scare Archfiend (anime)|Vector Scare Archfiend]]" (2400/↙↑→) to the Extra Monster Zone. Playmaker [[Normal 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 zone the top-center Link Arrow of "Vector Scare Archfiend" points to. "Vector Scare Archfiend" attacks and destroys "Nautilus" (Green-A: 1100 → 0 LP). ===Blue Angel vs . Prototype Red-B===[[File:Blue Angel VS Ai-A B.png|left|thumb|220x220px]]The Duel is conducted as a [[Speed Duel]]. '''<u>Turn 1: Blue Angel</u>'''<br />[[Skye Zaizen|Blue Angel]] [[activate]]s the [[Field Spell]] "[[Trickstar Light Stage (anime)|Trickstar Light Stage]]", [[Add a card|adding]] a "[[Trickstar]]" [[monster]] from her [[Main Deck|Deck]] to her [[hand]]. She adds "[[Trickstar Lilybell (anime)|Trickstar Lilybell]]". As "Lilybell" was added to Blue Angel's hand except by [[Draw a card|drawing]] it, she activates its [[effect]], [[Special Summon]]ing it (800/2000). Blue Angel [[Normal Summon]]s "[[Trickstar Candina (anime)|Trickstar Candina]]" (1800/400). As "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 "[[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 [[Prototype AiRed-B|Red-B]] (Red-B: 4000 → 3800 [[LP]]). Each time a "Trickstar" 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 Special Summons it in [[Defense Position]]. '''<u>Turn 2: Red-B</u>'''<br />Red-B draws. Each time a card is added to Red-B's hand, the effect of "Lycoris" inflicts 200 damage to him for each (Red-B: 3600 → 3400 → 3200 LP). As Red-B took damage by a "Trickstar" monster's effect, the effect of "Holly Angel" activates, increasing its ATK equal to the damage he took, until the end of this [[turn]] ("Holly Angel": 2000 → 2200 ATK). Red-B activates the [[Continuous Spell]] "[[Abyss Invitation]]". Red-B activates the effect of "[[Tentacluster 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 monster effect in his hand or [[GY]], the effect of "Narkissus" inflicts 200 damage to 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 (Blue Angel: 4000 → 3800 → 3600 LP). As Red-B took damage by a "Trickstar" monster's effect, the effect of "Holly Angel" activates, increasing its ATK equal to the damage he took, until the end of this turn ("Holly Angel": 2200 → 2400 ATK). Red-B activates the Spell "[[Machine Duplication (later anime)|Machine Duplication]]", targeting a [[Machine]] monster he controls with 500 or less ATK and Special Summoning up to two monsters from his Deck with the same name as that [[face-up]] monster. He targets "Darkwhip" and Special Summons two copies of "Darkwhip" (100/500). Red-B sets three copies of "Darkwhip" in the Link Arrows to Link Summon "[[Tentacluster Nautilus]]" (0/↙↓↘) to the Extra Monster Zone. As "Nautilus" was Link Summoned, Red-B activates its effect, Special Summoning a "[[Tentacluster]]" monster from his hand to his zone "Nautilus" points to. He Special Summons "[[Tentacluster Blastsucker]]" (400/400) to a zone "Nautilus" points to. Red-B Normal Summons "Blastsucker" (400/400) to a zone "Nautilus" points to. Red-B activates 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 two copies of "Blastsucker" on the field, Red-B activates their effects, destroying them, then inflicting 400 damage to Blue Angel (Blue Angel: 3600 → 3200 → 2800 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 (Blue Angel: 2800 → 2600 → 2400 LP). Red-B activates the effect of "Blastsucker" in his GY, [[banish]]ing it to inflict 400 damage to Blue Angel (Blue Angel: 2400 → 2000 LP, Red-B: 2300 → 2100 → 1900 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 (Blue Angel: 2000 → 1800 → 1600 → 1400 LP). As Red-B took damage by a "Trickstar" monster's effect, the effect of "Holly Angel" activates, increasing its ATK equal to the damage he took, until the end of this turn ("Holly Angel": 2400 → 2600 ATK). Red-B activates the effect of "Blastsucker" in his GY, banishing it to inflict 400 damage to Blue Angel (Blue Angel: 1400 → 1000 LP, Red-B: 1900 → 1700 → 1500 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 (Blue Angel: 1000 → 800 → 600 → 400 LP). As Red-B took damage by a "Trickstar" monster's effect, the effect of "Holly Angel" activates, increasing its ATK equal to the damage he took, until the end of this turn ("Holly Angel": 2600 → 2800 ATK). Red-B activates the Continuous Spell "[[Flexible Tentacluster]]", and activates its effect, targeting one of his banished "Tentacluster" monsters and Special Summoning it in [[Attack Position]]. He targets and Special Summons "Blastsucker" (400/400). "Blastsucker" [[attack]]s "Lycoris". As Red-B's monster declared an attack, Blue Angel activates her [[face-down]] [[Trap]] "[[Trickstar Cascade]]", returning a "Trickstar" card she controls to the hand to negate the attack. She returns "Light Stage" and negates the attack of "Blastsucker". '''<u>Turn 3: Blue Angel</u>'''<br />Blue Angel Normal Summons "Candina" (1800/400). As "Candina" was Normal Summoned, Blue Angel activates its effect, adding a "Trickstar" card from her Deck to her hand. She adds "Trickstar Temptation". Blue Angel sets "Narkissus" and "Lycoris" in the Link Arrows to Link Summon "[[Trickstar Black Catbat (anime)|Trickstar Black Catbat]]" (2000/←→) to the zone the bottom-left Link Arrow of "Holly Angel" points to (Red-B: 1500 → 1300 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 (Blue Angel: 400 → 200 LP). As Red-B took damage by a "Trickstar" monster's effect, the effect of "Holly Angel" activates, increasing its ATK equal to the damage he took, until the end of this turn ("Holly Angel": 2000 → 2200 ATK). As Red-B took damage by a "Trickstar" monster's effect, the effect of "Black Catbat" 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" ("Blastsucker": 400 → 200 ATK). 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 hand. He targets and returns "Blastsucker". "Holly Angel" attacks "Nautilus". Each turn, the first time Red-B would take battle damage from an attack involving his "Tentacluster" monster, the effect of "Flexible Tentacluster" prevents him from taking it. The attack continues and "Nautilus" is destroyed. "Black Catbat" attacks Red-B [[Direct attack|directly]] (Red-B ==: 1300 → 0 LP).

{{Decklist|Blue Angel (Aoi Skye Zaizen)|effect monsters =* [[Trickstar Candina (anime)|Trickstar Candina]] x2* [[Trickstar Lilybell (anime)|Trickstar Lilybell]]* [[Trickstar Lycoris (anime)|Trickstar Lycoris]]* ''[[Trickstar Narkissus (anime)|Trickstar Narkissus]]''

{{Decklist|Prototype AiGreen-A

{{Decklist|Prototype AiRed-B|effect monsters =* ''[[Tentacluster Blastsucker]]'' x2* [[Tentacluster Darkwhip]] x3|link monsters =* [[Tentacluster Nautilus]]