The name of the
Nebulon who
transformered to becoming the
engine that powered
PowerMaster Optimus Prime in both the
toy line, and
comic book.
Optimus Prime was killed in issues prior, and his body was brought to Nebulos for re-assembly and reanimation (the Nebulons had technology found nowhere else in the Galaxy). However, there was no way to power the Autobots once they were fixed. Optimus Prime was modified to take a Nebulon as his 'engine', which would supply power to his robot and vehicle forms
Anyone who had one of the toys soon realized that by losing Hi-Q, or any powermaster, it made it incredibly more difficult to actually transform the figure. The engine pressed a switch which released the toy for transformation