Tenkai Knights DVD Volume 04

The fourth DVD volume was released within the first DVD box on August 02, 2014. It contains four episodes and shows Toxsa on its packing.

Toxsa 2.0 (俺は努力なんてしねー！)
Jealous of his teammates all being able to achieve Tenkai Titan mode, Toxsa travels to Quarton to train in secret. Meanwhile, Vilius sends out an attack, and Toxsa is captured. The other Tenkai Knights travel to Quarton to save Toxsa. After realizing he needs his friends, He goes Tenkai Titan mode and forces Vilius's forces to retreat.

Two Sides to Every Coin (反転！善と悪)
On Earth, Guren receives Gen's advice about "choosing the side he wants". Meanwhile, the Corekai decide to infiltrate into the Dark Fortress to find the last Dragon Cube. But Dromus is equipped with a Core Corrupter to make the Corekai evil. Remebering Gen's advice, the Knights are able to turn their allies back to their old selves, causing Dromus to retreat. The heroes finally get all Dragon Cubes. Back on Earth, Guren's computer recives a message telling he is one of the "keys" that awake the Tenkai Dragon.

Dragon's Key (走れ！グレン)
In this episode Guren, Chooki, Toxsa, and Ceylan are split into two groups, Guren and Chooki is group 1 and group 2 is Toxsa and Ceylan. During this episode Guren and Chooki try to find a clue about the dragon key. They find a sign which takes them to another and another (at one of these signs they spot Gen). They finally arrive at the dragon key and have to go through booby traps. Guren finally gets through and takes the key. Meanwhile, Toxsa and Ceylan are fighting such a hard battle they have to go titan mode. They seem to be holding the Corrupted off but more keep coming. Suddenly Dromus shows up in the end and says, "everything is going according to plan Vilius."

Vilius Unleashed (大決戦)
Following the battle located in the Dragon's Nest, Guren and Chooki travel to Quarton with Boreas. The five Cubes are combined into one giant cube that can be only opened with the Dragon Key, awakening the Tenkai Dragon. However, Dromus captures it in a trap and transports it to the Corrupted headquarters. During the fight, Guren reveals his human identity to Vilius before destroying him. In the aftermath, Vilius revives and swears to conquer Quarton and Earth.