Primus

Primus is a planet introduced in the epynomous episode of Ben 10: Alien Force. Actually a giant organic machine created by Azmuth, it was recently revealed to be the source of the Omnitrix's and the Ultimatrix's DNA.



Backstory
Though not shown, Primus' existance was first hinted in Ghost Town, when Vilgax freed Ghostfreak in exchange of an unamed secret about the Omnitrix after Vilgax told him that he would set him free if he told him how to defeat Ben. Ghostfreak replied with a single word: "Primus". This secret is later revealed to be the existance and location of Primus in the eponym episode, where the planet appeared.

Intending to disable the Omnitrix, defeat Ben, take the Omnitrix and then reactivate it, Vilgax went to Primus. Sensing his arrival, the planet called Azmuth and the Omnitrix. The Omnitrix was then taken from Ben to Azmuth to help him defeat Vilgax. The galactic conqueror eventually defeated him and took the Omnitrix, but was unable to use it. Upon learning how important Primus was for Azmuth, he threatened to destroy it, but Ben was able to trick him in order to take the Omnitrix from him and defeat him. After Vilgax was gone, Azmuth moved the location of Primus so he could not find it again.

Description
Primus appears as a Jungle-like planet, full of vegetation and various unintelligent alien life forms, some of them dangerous. The main creatures on this planet are Voliticus Biopsis, mosquito/wasp-like, robots created by Azmuth who travel the Universe in order to find new alien DNA to add to the Codon Stream. The planet kinda has a mind of his own, as it was able to call Azmuth when Vilgax arrived.

The main element of Primus is the Codon Stream, a green liquid substance present throughout all the planet. It actually serve as database for the Omnitrix, containing all the DNA the Volicticus Biopsis find in the Universe. The Omnitrix communicates with this database, which gives it the information necessary to modify Ben's genetic code and allow him to transform.

Because of the Omnitrix's destruction, the Ultimatrix is now the only device in contact with the planet and alongsides its DNA.

Trivia

 * Primus is also the name of a character in the Transformers series, who is also a planet.