Yu - Gi - Oh ! 5D ' s - Episode 088 " Showdown at Sundown , Part 2 " , known as " The Trap Laid at the End of Victory " in the Japanese version , is the eighty - eighth episode of " Yu - Gi - Oh ! 5D ' s " . It first aired in Japan on December 9 , 2009 . However , he is unable to betray the Duel and ultimately summons " Infernity Doom Dragon " . Yusei summons " Stardust Dragon " and declares " I am going to save you ! " . However , Malcolm ' s best Duelist , Lawton , shows up and destroys Radley ' s gang . Barbara backstabs Yusei , revealing she knew the whole situation with Kalin and was Malcolm ' s fiancé . Yusei and Kalin are then taken to the mines . Featured Duels . Yusei Fudo vs . Kalin Kessler . Turn 7 : Kalin Kalin draws " Infernity Dwarf " and subsequently Normal Summons it ( 2 / 800 / 400 ) in Attack Position . He then tunes " Infernity Dwarf " with " Infernity Avenger " in order to Synchro Summon " Infernity Doom Dragon " ( 8 / 3000 / 2400 ) in Attack Position . Kalin then activate s the effect of " Infernity Doom Dragon " to destroy " Junk Warrior " and inflict half its ATK as damage to Yusei ( Yusei 1800 → 350 ) , however " Infernity Doom Dragon " will be forbidden from attacking this turn . Turn 8 : Yusei Yusei draws " Card Breaker " . He then destroys his face - down " Limiter Break " in order to Special Summon " Card Breaker " ( 2 / 100 / 900 ) in Attack Position . Since " Limiter Breaker " was sent to the Graveyard , its effect activates , allowing Yusei to Special Summon " Speed Warrior " ( 2 / 900 / 400 ) from his Graveyard in Attack Position . Yusei then Tributes " Speed Warrior " in order to Special Summon " Turret Warrior " ( 5 / 1200 / 2000 ) in Attack Position . Due to the effect of " Turret Warrior " , it gains ATK equal to the original ATK of " Speed Warrior " ( " Turret Warrior " : 1200 → 2100 / 2000 ) . Yusei then tunes " Card Breaker " and " Turret Warrior " with " Boost Warrior " in order to Synchro Summon " Stardust Dragon " ( 8 / 2500 / 2000 ) in Attack Position . Yusei sets a card . Turn 9 : Kalin Kalin draws a card and subsequently sets it . " Infernity Doom Dragon " then attacks " Stardust Dragon " , but Yusei activates his face - down " Power Frame " to negate the attack , equip " Power Frame " to " Stardust Dragon " , and increase the ATK of " Stardust Dragon " by the difference in ATK between " Stardust Dragon " and " Infernity Doom Dragon " ( " Stardust Dragon " : 2500 → 3000 / 2000 ) . Turn 10 : Yusei Yusei draws " Second Booster " and subsequently Normal Summons it ( 3 / 1000 / 500 ) in Attack Position . " Stardust Dragon " attacks " Infernity Doom Dragon " , but Kalin activates his face - down " Infernity Break " in order to remove from play " Infernity Dwarf " from his Graveyard and destroy Yusei ' s " Power Frame " ( " Stardust Dragon " : 3000 → 2500 / 2000 ) . Yusei then Tributes " Second Booster " via its own effect in order to increase the ATK of " Stardust Dragon " by 1500 ( " Stardust Dragon " : 2500 → 4000 / 2000 ) . " Stardust Dragon " destroys " Infernity Doom Dragon " ( Kalin 900 → 0 ) . Radley vs . Lawton . Turn 1 : Lawton Lawton draws . He then Normal Summon s " Gatling Ogre " ( 3 / 800 / 800 ) in Attack Position and sets five cards . Lawton then activate s the effect of " Gatling Ogre " five times to send all his set Spell / Trap Cards to the Graveyard and inflict 800 damage to Radley for every set Spell and Trap Card sent this way ( Radley 4000 → 3200 → 2400 → 1600 → 800 → 0 ) . Featured cards . The following cards appeared in this episode . Cards in italics debuted here .