Heatblast

In Cartoon Network's Ben 10 franchise, Heatblast is one of the alien forms available to child hero Ben Tennyson through use of the Omnitrix.

Description
The DNA sample of an alien Pyronite from the planet Pyros, Heatblast is a being composed of living magma with a rocky red exterior. His head is wreathed in flame, and is vaguely reminiscent of a skull.

Powers and Abilities
Due to Heatblast's nature, he is capable of manipulating fire to achieve a variety of effects, such as creating flame-based constructs, launching fireballs and laser attacks from his hands, enhancing the power of his punches with pyrokinetic energy, and flight via a rocket-like propulsion system. In addition, he is immune to all heat-based damage and his tough exterior makes him highly resistant to physical injury.

Weaknesses
Whilst still able to employ his powers to a limited degree even when fully submerged in water, prolonged exposure to any flame-retardant substance is sufficient to douse his abilities, rendering him much more vulnerable.