Monsters (魔物 Mamono) are beasts that feed on magical energy. Many monsters will often attack humans and their settlements, and they are feared and hated across the land.
Their numbers and ferocity begin to increase every ten years or so, and if the sacrificial pilgrimage fails, their attack on towns and villages will grow more intense. When this happens, they will sometimes destroy some villages completely.
Monster are grouped into different species: pengy, furred, sea, winged, intelligent, scaled, gentle and rulers of time.