Greenman Disease

“	A disease that might happen every thousand years in Lotte's hometown. When everything aligns perfectly in the worst possible way, such as the star's alignment, the amount of CO2 exhaled by humans, the birth rates of the Pacific herring and the timing of pollen discharges, this disease will occur in case a Hapansilakka pie is baked at a very precise temperature. Once one is infected, the person will turn to moss and eventually wither.	”
—Description of Greenman Disease from Witchpedia.

The Greenman Disease (緑人間病, Midori ningen-byō) is a magical disease in Finland caused by a confluence of conditions so strict that it can occur only once in a thousand years. These factors include astrological placement, the amount of carbon dioxide exhaled by humans, the birth rate of the local herring, pollen flight timing, and more. When everything aligns in the worst possible way, an outbreak will occur when Hapansilakka pies are baked at the perfect temperature.

Symptoms

Those infected by Greenman Disease are gradually covered in moss (starting with the hands) until they eventually wither away.

Countermeasures

“	In order to make an antidote, it is necessary to have “one snowflake that fell on a pine forest”, “the leaf of a berry that has been blown away by the wind”, “fresh droppings from a reindeer raised by a Sami”, “a green Amanita mushroom” and “a traditional medicine prepared by a yeti”.	”
—Description of Greenman Disease's Antidote from Witchpedia.

It is the responsibility of the local witch to contain the outbreak and prepare an antidote. The antidote, Greenman Disease Antidote, is brewed from five ingredients:

• Freshly fallen snow from a pine tree forest.
• Berry leaves blown off by the wind.
• Fresh droppings of a reindeer raised by a Laplander.
• Green Amanita.
• Traditional medicine base made by a master artisan (ex. Unnamed Finnish Yeti)

These ingredients are put in a pot of water and blended together until they become rainbow-colored. The ingredients begin to solidify as soon as they are placed over heat, so endurance and patience is required to stir the mixture constantly until it is ready.

Gallery

Screen captures

Mrs. Jansson petrified and full of moss in the middle of consulting with Witch's Medicine

Mrs. Jansson's finger points at the name of the local disease outbreak

Ditto

Sucy afflicted by Greenman Disease

Akko being hysterical due to Lotte succumbing to Greenman Disease

Akko asks Jansson family's messenger pigeon to find a nearby reindeer

Animated GIFs