The Colossus anti-air vehicle that uses technology from the GDIJuggernaut, the Forgotten secretly call it "Juggernaut Mk. IV".
The Colossus only spawns in the Forgotten Fortress. This unit acts like a heavy armored Scrapbus. A good counter to this unit are the Zone troopers/Black Hand or Mammoth tank/Avatar and Predator/Scorpion. If you try to counter it with an upgraded Paladin or Cobra, most probably the aircraft will die in the attempt.