And the last of the three Monsterbots is Doublecross (who would later be named the much better Twinferno). He turns into a double-headed dragon with a buzzing buzzsaw jutting from his breastbone. In robot mode, the dragon heads become his hands. Though the toy had sparking effects, the sparks did not shoot out of the dragon's mouths. Because that would be way too cool. He was available in 1987.
The combined form of the Universe Micromaster Aerialbots is Superion, an amalgamation of six robots plus their pack-in accessories that serve as connectors, head, and extremities of the gestalt warrior. While in Japan, the original source of the design ( Sixwing , 1992) was available in a collected set, this combiner needed to be purchased one bot at a time in the 2007 Universe release.