nightmares is a mod responsible for adding nightmares to Minecraft. When players fall asleep, there will be a 5% chance that the player will have a nightmare. The nightmares that we can live, for the moment, are three in number.
A witch that appears to damage the player spawns three to eight ghost spiders that damage the player and one to two ghost entities that will attack the player. In the future, its creator plans to add new nightmares, potion effects, and more monsters, among other things.