Swampfire

Swampfire was the first alien used by Ben in Alien Force, during the episode Ben 10 Returns: Part 1. Swampfire is voiced by Dee Bradley Baker.

Appearance
Swampfire is a humanoid plant-like alien with a flame-patterned head. Its species is taller than the average human, and it has a distinct rotten smell that worsens with heat.

Abilities
Swampfire's powers and abilities include: Superhuman Strength, Chlorokinesis, Regeneration, Fire projection, Gas Projection, and Seed Bombs that, once thrown, grow into large plants that are under his control. The fire blasts, semi-invulnerability and regenerating abilities have positioned him as a replacement of Benmummy, Wildvine, and Heatblast, making Swampfire Ben's new main alien.

Weakness
When Albedo transformed into Big Chill he was able to freeze Swampfire. However, this attack created little distraction as Ben broke free using a similar method that he used during the first Highbreed invasion. He ignited the methane in his wrists and broke free when Albedo least expected it. Swampfire, however, is more vulnerable than Heatblast because he can be frozen for periods of time, unlike Heatblast, who is completely invulnerable to cold.

Translation

 * Italian: Fango Fiammante / Flaming mud
 * Dutch: Moerasvuur/ Swampfire
 * Brazilian: Fogo Selvagem / Wild Fire
 * Russian: Пламенный / Flaming

Trivia

 * Swampfiret_Rough_Concepts_.jpgfire is the first Omnitrix alien used by Ben in Alien Force and the first ultimate alien used by Ben.
 * Like Ben's first transformation, Heatblast, they both use fire as their powers and both were Ben's first transformation when he got the Omnitrix.
 * Swampfire was also Ben's first transformation with the Ultimatrix, and he's ultimate form was also Ben's first ultimate transformation.
 * Swampfire was the first Omnitrix transformation on Alien Force and the last Omnitrix transformation of Alien Force(Vilgax used on the Bioids before the self destruct sequence being completed)
 * Swampfire is the first alien Ben uses in the Ultimatrix
 * He is like a replacement for Heatblast.

Ultimate Form

 * Ultimate Swampfire