Dragons

It is currently unknown what planet Dragons derive from. They can live an extremely long time. Due to they being 'dragons', the Forever Knights will stop at nothing to destroy this species.

Appearance
Dragons look just like what people depict them to look like. They have a lizard-like body with sharp bat-like wings and a sharp tail. They have a beak-like face. They also have dark green skin but this may differ from different kinds.

Abilities
Dragons also have abilities which people depict them to be yet they are not exactly the same.

Dragons are capable of firing lasers from their mouth which look like fire.

They are also shown to be quite powerful in terms of strength and their skin is strong enough to withstand powerful attacks.

Despite usually walking on all four legs, they are shown to be able to walk on only two and they prefer laser guns instead of their own lasers.

They can also live for millions of years, a thousand being barely ten.

Dragons
Darkfire - According to wiki, this should be an alien Ben will soon unlock although this could be wrong.

Ben - The Omnitrix should have the DNA so Ben should be able to turn into one.