Chariots of death for the female silver-draped
aliens, the Kilaak UFO was primarily a means of transportation for the alien race. However, it also has the ability to generate
a wall of heat, thereby incasing the spacecraft
in a living sheet of flame. A flying projectile
that can destroy anything it touches.
During the Kilaak invasion of Earth, the UFOs were making frequent trips to and from the moon. They were first spotted by the crew of the Moonlight SY-3, traversing on the moon itself. After the scope of the monster assaults were realized, the crafts were seen once more although this time at Mount Fuji. As the defense forces of Earth were in retreat from the combined might of Godzilla and Anguirus, the Moonlight SY-3 spotted a Kilaak saucer nearby. Attempting to pursue, the Earth heroes were chased away by Rodan. Going it on foot, they discover the Earth base of the Kilaak where their leader is located. The true weapon of the race, the Monster Control Device, is kept off planet. A fact that is discovered by the Moonlight SY-3 when another saucer is spotted on the moon, leading them to their base.
With the Monster Control Device compromised, Earth reverse engineers it and takes control of the monsters themselves, resulting in a final battle with King Ghidorah. However,
with all their ingenuity, the aliens underestimated
the will of human kind. As Godzilla ripped into
the exterior of their base after defeating King Ghidorah, this dropped the temperature
and forced the Kilaakian into hibernation. The
SY-3 then hunted down and destroyed the last saucer of
the alien race.