Yu - Gi - Oh ! 5D ' s - Ride 037 " Those We Protect ! ! " , known as " Someone to Protect ! ! " in the Japanese version , is the thirty - seventh chapter of the " Yu - Gi - Oh ! 5D ' s " manga . This chapter was first printed August 21 , 2012 in the 10 / 2012 issue of the " V - Jump " magazine . It was later reprinted in volume 5 of the . Summary . Tuning " Quick - Span Knight " with " Scarred Warrior , " Yusei Synchro Summon s a , as Leo says , Duel Dragon with silver wings , as Luna describes it " the black magician ' s dragon form , " " Stardust Spark Dragon , " which faces off against " Power Tool Mecha Dragon . " The score stands with Yusei at 2600 Life Points , Leo and Luna on 3500 . Leo looks worried , as Yusei activates the effect of " Quick - Span Knight " as it was used as Synchro Material , reducing the ATK of " Power Tool " by 500 , to 1800 . The 2500 ATK " Stardust " attacks with " Shooting Blast . " " Stardust " fires a beam from its mouth , and Leo asks himself if it ' s not enough . He doesn ' t have enough power to protect Luna . Luna calls him a bore as " Stardust ' s " attack blasts a hole through " Power Tool . " The Duel Dragon ' s Shadow Miasma is dispelled as it is destroyed , and Yusei reminds them that the effect of their own Field Spell Card , " " will double their battle damage from 700 to 1400 . The twin ' s Duel Runner swerves around as their Life Points are reduced to 2100 . Yusei catches up to them , telling them to take that . Leo looks up , his eyes having returned to normal , begging Yusei to save Luna as tears flow from his eyes . Yusei is shocked as Leo admits that he can ' t rescue her ; he isn ' t strong enough . Luna ' s lost , and she can ' t come back . Yusei is shocked that Leo has returned to sanity , and he wonders what happened . Above him , " Stardust " roars , and Yusei realizes that " Stardust ' s " attack purified " Power Tool ' s " darkness . Leo asks Yusei again to save Luna . Yusei asks him what ' s going on ; what does he mean , Luna can ' t come back . Leo explains that Goodwin said that if they defeated him , Luna would come back from the world in her book . Yusei is furious that Goodwin is toying with children ' s hearts for the sake of his own ambition . Luna speaks up , calling Leo a useless scarecrow . Her Miasma begins rolling off her as she states that it ' s all right . If they work together , they can punish the black magician . Her Shadow Miasma begins to pour into Leo , and he screams in pain , begging Luna to stop as her eyes glow under her hood . Yusei yells at Leo to fight it and stay with him , but Leo ' s hair falls from its ponytail , and his eyes go completely blank . Yusei realizes that he can ' t hear him , and Luna ' s Shadow Miasma has overtaken him . Luna declares their turn , and Leo draws . She activates the effect of their cycling Field Spell , " Seething Sun , " replacing it with " . " The effect of " Evening Sun " allows them to Special Summon a Synchro Monster from their Graveyard in Defense Position , Special Summoning " Power Tool , " still battered and missing its right arm and wings from its previous clash with " Stardust , " but having returned to a lighter colour scheme . Yusei is shocked to see " Power Tool " back on the field . Luna then Summons " Gekko , Mystical Medium of the Forest " and activates its effect to Special Summon a Forest monster from her Graveyard , reviving " Bat , The Forest Ninja , " which is spat out by " Gekko . " Luna then tunes the Level 3 " Bat " and the Level 4 " Gekko , " chanting " Spirit that rules the field from the forest of antiquity , veil yourself in flesh and descend to us , " as she Synchro Summons " Ancient Pixie Dragon . " Yusei asks if this is Luna ' s Duel Dragon , its Shadow Miasma is incredible . Luna ' s skin cracks as Sect ' s had , and she states " O king , we will give our all to defeat the black magician . " She explains that when a Field Spell is active , " Ancient Pixie Dragon " can destroy one card on the field . She tells the black magician ' s dragon form to return to forest dust , and light shines from behind the Duel Dragon as it uses " Spirit Burial . " Not gonna happen , Yusei replies . He activates " Stardust ' s " effect to select a card on the field and negate its destruction , selecting " Stardust " itself . " Stardust " surrounds itself with its " Sonic Barrier , " blocking the light beams . Luna is furious , clutching her " Kuribon " doll , and decides , in that case , they activate a Spell from their hand , " Curse of the Forest . " It reduces the ATK of one of their Synchro Monsters to zero , then reduces the ATK of a monster their opponent controls by the same amount . " Power Tool Mecha Dragon ' s " ATK is reduced to zero , and " Stardust Spark Dragon ' s " ATK to 200 . " Ancient " attacks , with " Fairy Tail Whip " but " Stardust " survives , as Yusei points out . Luna reminds him that he ' ll still take damage , and Yusei Go falls behind the twin ' s Runner , Yusei ' s Life Points falling to 700 as he cries out in pain . Yusei thinks that it ' s incredible Shadow Sense , so this is the power of Luna ' s Duel Dragon . Luna admits that the effect of " Curse of the Forest " vanishes at the end of the turn . She tells the black magician to mend his wicked ways or they ' ll eat him ( mirroring the storybook ) . Yusei thinks that Leo is being controlled by Luna ' s Shadow Miasma , and that he can ' t save the twins unless he defeats " Ancient . " He attacks with " Stardust ' s " " Shooting Blast , " and Luna angrily calls him a wicked black magician dragon . Leo ' s eyes lighten , and he groans that he ' ll protect Luna . He activates the card he Set at the beginning of the Duel , " Those We Protect " to switch the attack to " Power Tool " to protect " Ancient . " " Power Tool " dives in front of the attack , and since its DEF is equal to the ATK of " Stardust , " it survives the battle . Yusei asks himself what happened , as Leo is still under Luna ' s control and hasn ' t regained consciousness . He thinks that it can ' t be ; did he protect Luna on instinct ? Leo whispers that he ' ll protect Luna , and Yusei tells him that ' s right . That ' s how desperate he is to protect Luna . He tells him to wake up ; they ' ll break the Duel Dragon ' s hold on Luna together . But it ' s no good , Leo still can ' t hear him . In that case , he Sets a card , and then uses the effect of " Evening Sun " to revive his " Scarred Warrior " in Defense Position . He thinks that he and " Stardust " will call the twins as often as they have to , until they both retake control of their hearts . Leo continues to whisper that he ' ll protect Luna , while Luna announces their turn . The cycling Field Spell " Fairy Tale " then advances to the Featured Duel : Yusei Fudo vs . Leo & Luna . " Duel continues from the previous Ride . " The effect of " Quick - Span Knight " activate s , reducing the ATK of " Power Tool Mecha Dragon " by 500 ( 2300 → 1800 ) . Yusei attack s " Power Tool Mecha Dragon " with " Stardust Spark Dragon " , destroy ing it . The effect of " " doubles the Battle Damage inflicted to Leo and Luna ' s Life Points ( Leo & Luna : 3500 → 2100 ) . Turn 5 : Leo & Luna Luna takes over the Duel at this point by possessing Leo with her Shadow Miasma . The effect of " Fairy Tale Chapter 2 : Seething Sun " replaces itself with " . " Once per turn , " Fairy Tale Chapter 3 : Evening Sun " allows a player to Special Summon a Synchro Monster from their Graveyard in Defense Position . Luna uses its effect , Special Summoning " Power Tool Mecha Dragon " ( 2300 / 2500 ) in Defense Position from her Graveyard . Next , Luna Normal Summon s " Gekko , Mystical Medium of the Forest " ( 800 / 1600 ) , and activates its effect , Special Summoning " Bat , The Forest Ninja " ( 800 / 800 ) from her Graveyard . She tunes both monsters to Synchro Summon " Ancient Pixie Dragon " in Attack Position . As there is a Field Spell Card on the field , Luna activates the effect of " Ancient Pixie Dragon " , attempting to destroy " Stardust Spark Dragon " , but Yusei activates the latter ' s effect , targeting a card on the field and preventing its destruction for the whole turn . He targets " Stardust Spark Dragon . " Luna activates " Curse of the Forest " , reducing the ATK of her " Power Tool Mecha Dragon " to 0 , and decreasing the ATK of " Stardust Spark Dragon " by the former ' s ATK ( 2500 → 200 ) , until the End Phase . " Ancient Pixie Dragon " attacks " Stardust Spark Dragon " ( Yusei : 2600 → 700 ) , who is not destroyed due to its own effect . During the End Phase , the ATKs of both " Stardust Spark Dragon " and " Power Tool Mecha Dragon " return to their original values . Turn 6 : Yusei Yusei attacks " Ancient Pixie Dragon " with " Stardust Spark Dragon " , but Leo activates his face - down " Those We Protect " , changing the attack target to " Power Tool Mecha Dragon " . As its DEF is equal to the ATK of " Stardust Spark Dragon " , it isn ' t destroyed . Yusei Set s a card , and activates the effect of " Fairy Tale Chapter 3 : Evening Sun " , Special Summoning " Scarred Warrior " ( 2100 / 1000 ) in Defense Position . " Duel continues in the next Ride . " Featured cards . The following cards appeared in this chapter . Cards in italic debuted here .