Breath of the Wild introduces a world marked by recurring conflict between the kingdom of Hyrule and the evil being, Calamity Ganon. Each time that Ganon resurfaced, he was defeated by Princess Zelda, who descended from the Goddess Hylia with the help of her champion.[18] Over time, Hyrule managed to mature into an advanced civilization. Using their knowledge of technology, they decided to prepare themselves for Ganon's inevitable return by creating four massive animal-like machines called the Divine Beasts, as well as an army of autonomous, mechanical weapons, called Guardians.[19] Upon Ganon's return, four great warriors were each given the titles of champions and tasked with piloting one of the Divine Beasts to attack and weaken him, while the princess and her hero used the Guardians to protect them while the hero struck Ganon down with the Master Sword, allowing the princess to seal Ganon away