Another Heatblast

Heatblast (voiced by Steven Blum in the TV series and by David Franklin in the live-action movie) is a Pyronite (pyro meaning fire) from the star Pyros. Pyros, despite being a fully-functioning sun, has enough plots of semi-solid land for Pyronites to exist. Having evolved on a star, Pyronites are magma-based creatures that can project and control fire at will.[15]

The primary trait of Pyronites is their control over fire, which manifests in a variety of ways. From projecting bolts of flame, radiating heat in all directions, or even firing at the ground to propel themselves like a rocket, the fire-manipulation powers of Pyronites can produce a nearly-unlimited range of effects. This tends to make Heatblast's scenes some of the more spectacular ones in the series. Apart from this, Heatblast is also a highly durable alien, able to endure being thrown through buildings without being slowed.

However, Heatblast's natural abilities also necessitate care when handling people or other things that do not react well to intense heat. As Heatblast cannot reduce his ambient temperature to human levels, he cannot directly rescue people or remain in contact with objects for anything longer than a few seconds without lighting them on fire. Heatblast gets around this by creating vortices of flame to transport things without actually touching them. In addition, Heatblast himself is vulnerable to things that extinguish flame, namely water, sand, or foam. While small amounts of such materials simply evaporate, large amounts over an extended period can kill a Pyronite. However Heatblast has been shown to be able to swim and survive underwater and even to a certain extent been able to use his powers for a minute or so.[15] When he gets a cold, it directly affects his powers, giving him ice-abilities.

Heatblast is Ben's first transformation, which was activated in "And Then There Were 10" when Ben was tampering with the Omnitrix