The modification adds in your favorite game nightmares, which will appear with a small probability of 5% every time you fall asleep. They will be able to spawn dangerous mobs, to give you the effect of potions or just cause damage.
How to install Nightmares Mod
- Download and install Minecraft Forge
- Download and install Bookshelf
- Download mod
- Do not unzip it, copy to C:\Users\User_Name\AppData\ Roaming\.minecraft\mods