|Air date||Mar 7, 2012 (USA)|
|Written by||Brandon Sawyer|
|Directed by||John Delaney|
|Story by||Todd Garfield and Jeremy Corray|
|Supervising director||Steven E. Gordon|
It's Haggarium infection getting worse, Black Lion spontaneously leads the other lions to an ancient site on planet Ariel. The Voltron Force must conquer the cave's challenges to learn how to repair the lion and restore Voltron.
After trying to repair the Black Lion's Haggarium-infected Nexus, the lions appear to go crazy and leave Arus. The Force track the lions to planet Ariel. However, they must survive a series of trials in the Path of Lions, Den of Creation, sacred grounds deep inside the mines in The Forge where Voltron was originally forged in order to find his creator. The Krelshi block Vince from the entrance warning him that even though he's worthy of being on the force, he's not ready for the trials yet.
Meanwhile, the trials are taking place down below; first the team must escape a giant electrified circuit board tech puzzle. Then the team must speed through a series of death-traps of swinging blades and giant hammers. Next are two chambers that contain lazer towers aimed at them and battle robots they have to fist-fight with. Lastly, they come to the Blacksmith workshop where Voltron was created by the union of five planets; four of which they know to be Balto, Ariel, Earth, and Arus. This room leads to a battle with the Krelshi, leading Vince to unify the team by getting past the trial himself and joining them in the fight.