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 effect damage, bringing his life down to zero, causing him to die, and the shock of which puts Luna in a critical state as her life gradually starts to go down. 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.