Tenkai Dragon

The Tenkai Dragon (Japanese: テンカイドラゴン, Tenkai Doragon) is a powerful creature that lived on Quarton. In the English version, it was summoned by Vilius to combat the Corekai. Unfortunately, it proved too powerful, and he lost control. It was later defeated by the Tenkai Knights, who caused it to shatter into the five Dragon Cubes, which were scattered across Quarton.

In the Japanese version, it was summoned by Quarton when the Corekai and Corrupted fought each other. The dragon attacked both sides, causing the Knights to be deactivated and Vilius to retreat.

Reviving the Tenkai Dragon
In the order to awaken the Tenkai Dragon, the five Dragon Cubes must be combined, and one of the two keys must be used to unlock either the Dragon's good side or it's evil side. The Tenkai Knights managed to find the White Key and unlock the Tenkai Dragon. However, it was captured by Dromus for Vilius.

In "A New Knight", the Tenkai Dragon was commanded to attack the Knights by Vilius until he was knocked off of the Dragon by Dromus. The Dragon was then trapped by the Guardians and Bravenwolf used the White Key to change it from evil to good. He and Dromus used the two keys power, causing the Dragon to split into Dragon Cubes. They went into their respective Knight, unlocking Phoenix Mode.

In "Vilius Returns", Vilius took the Tenkai Knights energy to reawaken the Dark Tenkai Dragon, without using the black key. Because of this, the Dragon was unstable. When Dromus came from the sky and attacked the Dragon, it split into black and white Dragon Cubes. The white cubes went into the Tenkai Knights and the black cubes went into Vilius, giving them elemental powers.

In Toxsa blocked the tenkai knights as well as Vilius as well as the gaurdians both revive their dragon and they begin battling but one of the blows sends Bravenwolf Tributon Valorn and Lyendor all back to earth and very confused. (The episode then ends)

In Tower of bricks Dromus and Venetta are still stuck on Quarton and Vilius uses a lot of his power and converts the good dragon evil as well. When the rest of the tenkai knigtss come back they are in big trouble since they have to battle 2 evil dragons and they are all beaten. Beag then sacrifices his life to try and distract Vilius and the dragons but Bravenwolf jumps and blocks the attack and everyone thinks he is dead now when his wolf emblem from Scorpidon lifts up from above his body and Bravenwolf comes back to life as well as bringing to life a giant golden wolf thing.