The MK. IV "Cuttlefish" tripod seems to be the ultimate weapon of the invaders; but it is also possible that this monstrous achievement of alien technology is only the forerunner of even worse things to come. Whatever the case, the "Cuttlefish" displays a terrifying combination of speed, maneuverability, and weaponry: powerful energy shields, long-range heat ray, multiple black smoke launchers. It is, as yet, undefeated on the battlefield - but the bravest "Knights of the Air" are trying to find out who will be the first to destroy one!