Life Stream Dragon (character)

This dragon is a mysterious creature who is a member of the Five Dragons. The fifth Signer associated with it bears the Crimson Dragon's Head birthmark, however its identity is currently unknown.

"Power Tool Dragon" belonging to Leo, looks like a mechanized version of the fifth Dragon. Leo mistakenly believed "Power Tool Dragon" to be the fifth dragon and believed himself to be the fifth Signer, after asking Luna if "Power Tool Dragon" took part in the ancient battle between the Five Dragons and the Earthbound Immortals. Luna replied that maybe it did, just to make him happy, although she didn't think it was the same dragon, since such a robotic dragon could not have taken part in the ancient battle, since it's too high tech.

There's a possibility that it's real name is Savior Star Dragon, because it's the cover card for the Stardust Overdrive Booster Pack and regarding the previous pattern in the booster packs so far...