In many a story, Giant Monster Attacks are a common theme, usually when it comes to the main antagonist (or a minor one) whom capable to transform into giant monster (some case overlapped with the One-Winged Angel case if the villain's monstrous form is very huge) or IS a giant monster in nature attacking a city, a place, or a ship for these reasons: * For sadistic amusement. * To hunt down the hero. * To claim a sacrifice. * To lay a siege on a nation.