Elemental calendar 2500 years. On Bibo Star, monster beasts appeared for the first time; in July 2640 of the Elemental Calendar, humans discovered for the first time that the energy of the elemental crystal nuclei of monster beasts was embedded and utilized; in August of 2640 of the Elemental Calendar, a large area of Bibo Star experienced catastrophic events, with high temperatures scorching the earth during the day, fires from the sky, fires from the earth, tornadoes, and frequent floods.
