Miasma ( term ) Miasma is a recurring term in the " Final Fantasy series " . It is a poisonous , gaseous substance that plagues the world and surrounds everything like air . Miasma is similar to Mist , a gaseous monster - creating substance found in " Final Fantasy IX " and the " Ivalice Alliance " . Appearances . " Final Fantasy Crystal Chronicles " . Miasma is pure poison . Even the slightest contact harms a person , and prolonged contact with it can cause death . Furthermore , it is the substance that is responsible for the appearance of the monsters . It is said that long ago there was no Miasma and no monsters . Although , in " Ring of Fates " which takes place before the spread of Miasma monsters still exist . This is the same for " My Life as a King " where the Miasma is now gone but monsters still exist . Sometimes a random Yuke in " My Life as a King " will question this and say that the " definition " of what people thought monsters were will have to change . The only way to keep the Miasma away is to remain inside the barrier of a crystal . The crystals in the world are protecting the people from the Miasma , but their power is not endless . Every year the crystals have to be cleansed by Myrrh , which is collected by the Crystal Caravans . Miasma is the eternal threat to the people . Miasma is produced by the Meteor Parasite , brought to the world in a meteor that crashed into Mount Vellenge centuries ago . The gas brings pain and suffering to the world , so that the memories of the people are focused more on this pain and suffering . This is because Raem , who devours the memories of people , prefers these kinds of memories , and as a result has a somewhat symbiotic relationship with the parasite . When the miasma began to spread over the land , the Carbuncles advised the inhabitants to live near the crystals , which emit a protective barrier warding off the miasma . As a result , settlements sprouted wherever such a crystal rested . " Final Fantasy Crystal Chronicles : Ring of Fates " takes place before the Meteor Parasite arrived , thus before the spread of Miasma . In Alhanalem ' s collection of books , there is one book titled " CRYSTALS AND BIG BANG THEORY " which briefly reads , " As for the relationship between crystals and Miasma . . . " Not much is revealed by this quote , other than Miasma was known to exist before the Meteor Parasite ' s arrival . In certain dungeons there is a poisonous gas that fill rooms , similar to Miasma . In the Crystal Temple , certain rooms are filled with the gas and can only be repelled by a Lilty ' s urn . When a Lilty ' s urn is placed on certain platform in these gas rooms , they create temporary sphere around the party that keeps the gas out just like the Crystal Chalice in the original game . The other dungeon filled with this gas is the River Belle , which is a remake of the River Belle Path from the original game . In multiplayer mode , a Yuke who returns after the player clears a certain dungeon mentions that he seemed to wander into a separate world , filled with miasma , where the only safety was in the crystals ' light . " Final Fantasy Crystal Chronicles : My Life as a King " takes place directly after the original game . The young King Leo is beginning to restore his Kingdom after it had been destroyed by the Miasma . While the Yuke that resembles Lich from " Ring of Fates " attempts to tell a moral story to a mother Lilty and her daughter , she makes a story about a disease in the air that slowly killed off people near it . Eventually , the Lilties believe in the story , with the mother Lilty stating " " We ' re going home straight this instant ! And when we do , we ' ll brush our teeth and scrub our hands until they ' re pink ! " " " Bravely Default " . The Miasma Woods connects the Harena and Florem Region s , and contains several portions of the ground that will poison whoever steps in it . Due to the skystone of the " Eschalot " being destroyed , the party is forced to travel to Florem by way of the woods . Fortunately , the awakening of the Wind Crystal allows the wind to pick up again , thinning the miasma somewhat and allowing the party passage through the woods . A thick miasma prevents anyone from getting close to the Ba ' al Crater .