Yu - Gi - Oh ! GX - Episode 042 " Duel Monsters Spirit Day " , known as " School - Festival Duel ! Blamagigirl Barges In " in the Japanese version , is the forty - second episode of the " Yu - Gi - Oh ! GX " anime . It first aired in Japan on July 20 , 2005 and in the United States on March 2 , 2006 . Summary . A strange , yellow ball of light was floating around Duel Academy . Apparently , it was Duel Monsters Spirit Day , the day where students appreciate the Duel Spirits and dress up as their favorite monster . The yellow light was the spirit of the " Dark Magician Girl " . She wanted to stop by the Academy and make Spirit Day a day the students will never forget . Meanwhile , all around the school , students were celebrating spirit day . Chumley and Syrus worked together to create a Duel arena outside of the Slifer Red dorm , for Syrus ’ costume Duel . The remaining holders of the Spirit Keys meet outside the dorm to discuss what Atticus had said in regards to Professor Banner - he had been the one to instruct the students to go to the Abandoned Dorm . Banner had since disappeared , so they believe he is working for the Shadow Riders . Chazz comes up with the idea of using Banner ' s cat Pharaoh to find Banner , but is unable to locate him either . Having no other options , they agree to just attempt to enjoy Duel Monsters Spirit Day . Syrus attempts to find someone to dress up as " Dark Magician Girl " for the costume Duel . Jaden is unable to decide on a costume , and instead combines pieces of several . He ultimately ends up a combination outfit that contains the parts of other costumes like the hat of " Saggi the Dark Clown " , the body suit of " Breaker the Magical Warrior " , the shoulder pads of " Celtic Guardian , " and the shield of " Gearfried the Iron Knight " . Chazz dresses as " XYZ - Dragon Cannon " , Alexis , Mindy and Jasmine go as " Harpie Lady Sisters " and Bastion dresses as " Amazoness Tiger " . Ms . Dorothy dresses as " Dark Magician Girl " , much to everyone ' s horror . They are approached by someone who appears to have a perfect " Dark Magician Girl " costume , and she agrees to Duel Jaden . After the Duel , everyone was curious as to who exactly was the Dark Magician Girl . Syrus figured it out that she was the spirit of Dark Magician Girl and hoped to see her again someday . That night , her spirit returned and gave Syrus a kiss before departing . Featured Duel : Jaden Yuki vs . Dark Magician Girl . Turn 1 : Dark Magician Girl < br > Dark Magician Girl draws " Dark Magician Girl " . She then Set s a monster . Turn 2 : Jaden < br > Jaden draws " Elemental HERO Bubbleman " and subsequently Normal Summons it ( 800 / 1200 ) in Attack Position . Since " Bubbleman " was summoned while Jaden had no other cards on his side of the field , its second effect activates , allowing Jaden to draw two cards . Jaden then activates " Polymerization " to fuse " Bubbleman " with " Elemental HERO Burstinatrix " in order to Fusion Summon " Elemental HERO Steam Healer " ( 1800 / 1000 ) in Attack Position . " Steam Healer " attacks and destroys Dark Magician Girl ' s face - down monster , " Fire Sorcerer " ( 1000 / 1500 ) . Since " Fire Sorcerer " was flipped face - up , its Flip Effect activates , allowing Dark Magician Girl to remove from play two random cards ( " Dark Magician Girl " and " Magician ' s Valkyria " ) in her hand and inflict 800 damage to Jaden ( Jaden 4000 → 3200 ) . Since " Steam Healer " destroyed a monster by battle and sent it to the Graveyard , its effect activates , increasing Jaden ' s Life Points by the ATK of the destroyed monster ( Jaden 3200 → 4200 ) . Turn 3 : Dark Magician Girl < br > Dark Magician Girl draws . She then Normal Summons " Magician ' s Valkyria " ( 1600 / 1800 ) in Attack Position . While this card is face - up , Jaden can ' t select any Spellcaster - type monster besides " Magician ' s Valkyria " as an attack target . Dark Magician Girl then activates " Dimension Fusion " to pay 2000 Life Points ( Dark Magician Girl 4000 → 2000 ) and allow both players to Special Summon as many removed from play monsters as possible ; Dark Magician Girl " Special Summons " Dark Magician Girl " ( 2000 / 1700 ) and a second " Magician ' s Valkyria " ( 1600 / 1800 ) in Attack Position while Jaden doesn ' t summon anything . Since Dark Magician Girl now has two " Magician ' s Valkyria " , an attack lock has been formed . " Dark Magician Girl " attacks and destroys " Steam Healer " ( Jaden 4200 → 4000 ) . The two " Magician ' s Valkyria " attack directly ( Jaden 4000 → 2400 → 800 ) . Turn 4 : Jaden < br > Jaden draws . He then activates " Fusion Recovery " to add " Burstinatrix " and " Polymerization " from his Graveyard to his hand . Jaden then activates " Polymerization " to fuse " Burstinatrix " with " Elemental HERO Avian " in order to Fusion Summon " Elemental HERO Flame Wingman " ( 2100 / 1200 ) in Attack Position . Jaden then Sets two cards . Turn 5 : Dark Magician Girl < br > Dark Magician Girl draws " Magic Formula " and subsequently activates it , equipping it to " Dark Magician Girl " and increasing its ATK by 700 ( " Dark Magician Girl " : 2000 → 2700 / 1700 ) . " Dark Magician Girl " attacks " Elemental Hero Flame Wingman " , but Jaden activates his face - down " Staunch Defender " and his face - down " Hero Barrier " , with their effects resolving in reverse order . First " Hero Barrier " negates the attack made by " Dark Magician Girl " . Next , " Staunch Defender " forces the two " Magician ' s Valkyria " to attack " Flame Wingman " . " Flame Wingman " destroys both " Magician ' s Valkyria " ( Dark Magician Girl 2000 → 1500 → 1000 ) . Since " Flame Wingman " destroyed monsters by battle and sent them to the Graveyard , its effect activates , inflicting damage to Dark Magician Girl equal to the ATK of her destroyed monsters ( Dark Magician Girl 1000 → 0 → 0 ) . Featured cards . The following cards appeared in this episode . Cards in italics debuted here .