Signer Dragon

The Five Dragons are a series of Dragon-Type Synchro Monsters, introduced in Yu-Gi-Oh! 5D's. These legendary dragons play a part in the legend of the Crimson Dragon, as being connected to the Signers themselves. That connection being that these legendary beasts who are actually servants to the Crimson Dragon, were the ones who sealed an evilness within the Nazca Lines.

That same evil which is now known as the Earthbound Gods,which have reappear once again on the world as duel monster cards used by the Dark Signers.

So far 3 of the Five Dragons have been released in the OCG and TCG: "Stardust Dragon", "Red Dragon Archfiend" and "Black Rose Dragon". "Ancient Fairy Dragon" also has a scheduled OCG release. A mechanical version of the fifth dragon, Power Tool Dragon, is also scheduled for OCG release in the next pack, Raging Battle.

Members
Each of the five Signers possesses one of the Five Dragons. Currently, all five dragons have been shown, although only four have been named and associated with a Signer:

"Power Tool Dragon", which belongs to Leo, is theorized to be a mechanical version of the fifth Dragon. Leo automatically thinks he's the last Signer after he asks Luna if it's true that this machine Synchro monster may have took part in the ancient battle. Luna replies that maybe it did, just to make him happy. She then tells Bolt Tanner and Tenzen Yanagi that there would be no way the robotic Dragon could have taken part of the ancient battle.

Assault Modes
"Stardust Dragon" and "Red Dragon Archfiend" have their own "/Assault Modes": "Red Dragon Archfiend/Assault Mode" and "Stardust Dragon/Assault Mode". Both of them were Summoned by Yusei and Jack in a special episode.

Summoning Quotes
In the Japanese anime, when Synchro Summoning one of the Five Dragons, their corresponding Signers chant a quote that describes them.

Yusei Fudo
''Tsudoishi negai ga, arata ni kagayaku hoshi tonaru! Hikari sasu michi tonare! Shinkuro Shoukan! Hishouseyo, Sutādasuto Doragon!!! "Clustering hopes become a new shining star! Become the path its light shines upon! Synchro Summon! Take flight! Stardust Dragon!" (In the english anime, when Yusei said Synchro Summon in Japan, he would say some variation of "Rev it up")

Jack Atlas
''Ouja no kodou, ima kokoni retsu wo nasu! Tenchi meidou no chikara wo mirugaii! Shinkuro shoukan, waga tamashii, Reddo Daemonsu Doragon!''

"The ruler's heartbeats will now file through here! Take witness to its creation-shaking power! Synchro Summon! My very soul! Red Demons Dragon!"

Akiza
''Tsumetai no hono ga sekai no subete wo tsutsumikomu! Shikkoku no hana yo hirake! Shinkuro shoukan, arawareyo, Burakku Rozu Doragon!''

"Chilling flames engulf the entire world! Pitch-dark flower, set into bloom! Synchro Summon! Appear now! Black Rose Dragon!"