Face Dusk Bringer!
Humanity trembles when this name is pronounced: DUSK BRINGER, Flying Invader! The Earth Federation has created a dossier on it in the vain attempt to find a weak point.
“Just like the wyvern of legends, this colossal winged Invader dives on the cities of humans like the eagle on a rabbit, obscuring the sun. It is partially sentient and gifted with strange, alien mystical abilities: thanks to its jaws, it can spell out words in an unknown language, and such words extend like an echo in the surrounding areas, somehow reinvigorating the Invaders that hear them, and stimulating their regeneration. It has no anterior paws: when attacking, it grasps the highest buildings with its strong rear talons, raining fire over the underlying victims.”