Warning! This mod contains jumpscares!

Smilers

They are scary looking entities which stare you down in the darkness of the night.

Smilers are known to live in the darkest of places, so watch out when you're exploring a cave or just going outside midnight, because they can get you by suprise, and trust me: you don't want to get close to them.

Basic Info

Basically the entities spawn each night, and they vanish when exposed to daylight, making venturing out in the dark way much scarier and risky. They get angry when you get close to them, so watch your steps.
There's a very small chance of spawning The Man From The Fog

(if you have it installed (if not get it here), when you get too close to them. 

Depedencies 

• The Man From The Fog (Not Required) Get It -> Here
  
• Configured mod by MrCrayfish (Not Required, adds a way to tweak the jumpscare settings to your liking)
• Optifine (Not Required, but the mod looks better with shaders)

Good Luck :)