Reignfire was essentially made into an evil clone of Sunspot.
Reignfire controversy:
The villain Reignfire first takes over the Mutant Liberation Front by force, and in a battle with X-Force, even removes his mask to reveal the face of Sunspot. Cable 'heals' Sunspot of this persona dominating his body, transferring some of his Askani knowledge into Sunspot, allowing Sunspot to speak the Askani language and know of their meditation techniques. All seems well until X-Force finds out that someone resembling Sunspot has attacked and kidnapped their friend Skids. Upon investigation it is discovered that Reignfire is alive and separate from Sunspot and thus not simply an aspect of his mind. Supposedly Reignfire was a protoplasmic cellular construct that had patterned itself after Roberto when it had received a cell sample from him (a plot element introduced by John Francis Moore, who thereby retcons Nicieza's original intentions). Reignfire was essentially made into an evil clone of Sunspot. Reignfire gained a new ability though, and could now forge a telepathic link with his progenitor, thereby explaining the times that Roberto would switch to a more evil persona. Shortly after this story, Reignfire met his demise.