The Miasma is a magical purple fog that—with the exception of the Relief—envelops the entirety of Fio. It reaches almost 36,000 feet into the sky and has tides affected by Fio’s moon, Auga. Malformed landscape plagued by sickened flora and fauna is revealed and concealed from west to east on a 23½-day cycle. Occasionally, migrating monsters and even rogue earthmotes emerge from the Miasma, proving that survival is possible beyond the barrier if the effects of Miasma Psychosis can be avoided. Adventurers that brave the Miasma occasionally return with tales of strange stone pillars that can be activated to disperse areas of the gloom, though the history of these pillars remains a mystery.
Miasma Psychosis
Venturing into the Miasma for prolonged periods of time without protection or being maimed by one of the aberrations within can lead to a special condition called Miasma Psychosis. Miasma Psychosis is measured in six levels. An effect can give a creature one or more levels of psychosis, as specified in the effect’s description.
Psychosis Table
| Level | Effect |
|---|---|
| 1 | The creature is exposed to the Miasma and has disadvantage on attack rolls and ability checks |
| 2 | The creature becomes dizzy and its speed is halved |
| 3 | The creature experiences vivid hallucinations and has disadvantage on saving throws |
| 4 | The creature’s skin tone becomes pallid and its hit point maximum is halved |
| 5 | The creature suffers extreme paranoia and must use its action each round to attack the nearest creature |
| 6 | The creature becomes an aberration: it can’t understand language, or communicate in any intelligible way |
If an already psychotic creature suffers another effect that causes psychosis, its current level of psychosis increases by the amount specified in the effect’s description. A creature suffers the effect of its current level of psychosis as well as all lower levels. For example, a creature suffering level 2 psychosis has its speed halved and has disadvantage on attack rolls and ability checks.
An effect that removes psychosis reduces its level as specified in the effect’s description, with all psychosis effects ending if a creature’s psychosis level is reduced below 1. Finishing a long rest reduces a creature’s psychosis level by 1, provided that the creature is outside the Miasma and has also ingested some food and drink.
A greater restoration spell can reduce a creature’s psychosis level by 1. Also, being raised from the dead reduces a creature’s psychosis level by 1. Effects that remove psychosis have no effect on creatures suffering level 6 psychosis excepting a reincarnate or true resurrection spell. Creatures suffering from psychosis are always treated as poisoned.