A relentless and unearthly durable type of dimensional fatigue 'denizen'
Also known as demons, mutants, and monsters, Youma were once human beings.
Strange creatures, half dreamed half imagined, figments of delerium, wisps of insanity.
After particularly intense storm, a green glowing fungi can be found on the trees and plants. Also new monsters seem to be in the region. These storm are obviously bringing these things from other places and depositing them with the wind, rain, and goop upon the land.