As Jack, Leo and Luna struggle to survive, Aporia summons his key monster, Machine Divine Emperor Dragon Asterisk which will inflict 1000 points of damage to anyone who tries to Synchro Summon. Lamenting that he hasn't been able to protect anyone, Leo risks some of his own life points to protect Jack and Luna and weaken Asterisk. Leo then summons Power Tool Dragon and Ancient Fairy Dragon and gets hit by the 4,800 points of effect damage, bringing his life down to zero, causing him to die. The shock of Leo's death puts Luna in a critical state, as her life points gradually starts to drop, as her pulse weakens. However, Leo comes back to life with 100 life points, thanks to Ancient Fairy Dragon, and his Morphtronic Lighton's effect, and becomes the sixth and final Signer, with the Mark of the Crimson Dragon's Heart. Noticing Luna's life is in danger, as her life points are now down to 18, Leo calls upon the Crimson Dragon's power, and Synchro Summons Power Tool Dragon's true form, Life Stream Dragon, the sixth Signer Dragon.
Dans son combat contre Aporia, Lua tente tout pour protéger ses amis, mais sans succès. De plus, cela permet à Aporia d'infliger encore plus de dommages à Jack et Luca. Lua commence à perdre espoir, et Aporia en profite pour invoquer son Dragon Astro Meklord Astérisque et lancer une attaque. Les trois se retrouvent sur le fil du rasoir. Et même si Aporia répète sans cesse aux trois duellistes de se rendre pour sauver leur vie, Lua fait preuve de courage et lui tient tête.
ジャック・龍亞・龍可ＶＳアポリア！仲間を守ろうと張り切る龍亞だったが、その攻勢が裏目に出て、ジャックと龍可はライフポイントが残り100になってしまう。倒れた仲間を前に呆然と立ちつくす龍亞。そんな中でアポリアは非情にも機皇神龍アステリスクを召喚し、一気に攻撃をしかけてくる。窮地に追い込まれる三人。龍可を命をかけて守ろうと決心した龍亞は、敢然とアポリアに立ち向かう。そんな龍亞にアポリアは全員の命が助かる方法としてサレンダーを勧めるが･･････。
