Dragon's Key

Dragon's Key (Japanese: 走れ！グレン) is the twelfth episode of Tenkai Knights. It first aired on November 9, 2013 on Cartoon Network in the United States.

Plot
The boys split into two groups, Guren and Chooki try to find out anything they can about the White Dragon Key. They find a sign which takes them to another and another, all of which are being placed for them to find by Gen. They finally arrive at the key and have to go through a booby trap to obtain it. Guren finally gets through and takes the key.

Meanwhile, on Quarton, Toxsa, as Valorn, and Ceylan, as Tributon, along with Beag, stand guard over the Dragons Nest, the one place the Tenkai Dragon can be revived. The Corrupted eventually attack them on mass and the boys have to go into Titan Mode. They seem to hold the Corrupted off, but Dromus shows up in the end and says that everything is going according to his plan.