The Fire-Eater Alien was created by Warren Ellis and Chris Sprouse. It made a singular appearance in the 1998 crossover one-shot, WildC.A.T.s/Aliens.
Major Story Arc
After Skywatch was attacked by an unidentified alien threat, a newly-reassembled WildC.A.T.s team set out to combat what they believed to be a Daemonite threat. They were instead met by the entirely unanticipated threat of Xenomorphs, which had invaded Skywatch, and used many of its personnel to create more of its warriors.
While searching Skywatch for survivors, the WildC.A.T.s team was surprised yet elated to come across Fahrenheit. They soon saw that it was actually just her lifeless body being carried by the Fire-Eater Xenomorph that had burst from her chest. It then further surprised the WildC.A.T.s team by releasing a massive burst of fire from its mouth. This caused Spartan and Grifter to realize just how grave a threat the Xenomorphs could prove to be given the number of superhumans aboard the Skywatch space-station for the aliens to use as hosts.
The Fire-Eater Alien was killed along with its Xenomorph kin when Winter piloted Skywatch into the sun in order to prevent the Xenomorph threat from reaching Earth. The WildC.A.T.s survived thanks to the teleportation abilities of Void.
Powers & Abilities
The Fire-Eater Alien had the traits inherent in all Xenomorphs - claws, acid blood, and so forth; it also possessed the unique ability to breathe fire because of Fahrenheit having been its host, but it did not appear to have access to Fahrenheit's full abilities to project and control fire.