SmileHorror.

⚠️This modpack is very difficult.
--Mod info--
The Man From The Fog: As night falls, the ethereal figure known as The Man From The Fog emerges, lurking in the darkness with malevolent intent. Beware he will try to kill you and there is multiple types of him.
                                          He will continue to stalk you during the night until sunrise so beware of any weird noises lurking in the darkness. He can climb obstacles and break them to get to you also destroying any door,                                              glass and more.
Cave Dweller: Venture into the depths of Minecraft's caverns at your own risk and caution, as the Cave Dweller awaits in the shadows. This entity lurks in the caves during night time ready to find and kill any unlucky                                       adventurer on his path. So always be careful when mining not to accidently run of somewhere and maybe even your death.
The starved stalker: The Starved Stalker will spawn and start walking towards you, and once it is close enough, it angers and starts chasing you down. It can climb walls, so don't even try pillaring up. If you manage to                                         kill him he might give you his tooth that you can craft a starved dagger with.
This modpack also includes the  True Darkness mod to make the night even harder to see in.
With the mod Engulfing Darkness you will begin to die in the darkness if you don't get out of it or you can also use torches to make light appear.
The Lunar mod has different types of night that might give buffs or even debuffs based on what type of moon it currently is.
And with the Tough As Nails you will be needed to always keep track of the temperature and your water bar. 
 Insanity Shaders: To intensify the nightmarish atmosphere, we recommend the use of Insanity Shaders. Watch as the world around you warps and distorts, casting an otherworldly pallor on your surroundings. These shaders heighten the horror, turning every shadow into a potential threat and ensuring that your descent into the abyss is a truly chilling experience.