Miasma II (ミアズラ, Miazura?) is a magic ability in Final Fantasy XIV and a stronger version of the Miasma ability. The spell appears as an Arcanist ability available at level 46. Miasma II deals unaspected damage with a potency of 20 to all targets in range surrounding the caster and deals damage over time with a potency of 10 for a period of 15 seconds. In addition, the ability also has the chance to inflict the Disease status for a duration of 15 seconds. Miasma II has a casting radius of 5 yalms and has an instant cast time and a recast time of 2.5 seconds. The ability can only be used by Arcanists, Scholars, and Summoners.
In the Japanese version of the game, Miasma II is called Miasara.
Early medical theories predating the discovery of microorganisms often associating foul air, called miasma, from crowded conditions or rotten objects as a cause of disease.