Original modpack is made by RexMC. All credit goes to him for the majority of this modpack. https://www.curseforge.com/minecraft/modpacks/herobrine-from-the-fog

I have permission to use his modpack as a base for mine, here's proof: Thank you again for allowing me to use your modpack, Rex!
Proof of Permission given by RexMC himself. Thank you, Rex!

This is a modified version of the From The Fog Modpack! I suggest you play the original, as this version adds many more mods, like Aether and its addons and Twilight Forest!I've made this for me and my friend.
You will be hunted by horrifying entities from within the darkness, ones that stalk you, ones that rush you, ones that scare you, ones that prevent you from sleeping.Over time, things will ramp up further and further, until it will linger at a certain intensity. Blood moons will make this experience worse for the player, as monsters no longer burn in the daylight.

Herobrine will taunt you, scare you, it is up to you whether you let him stay or banish him into the Farlands of Minecraft's Code.

The Man from the Fog will not rest until your heart stops beating.

The Midnight Lurker will get you anywhere during the night time. Whether it is on the surface, in the cave system or otherwise.

The Knocker will prevent you from sleeping, making you get up constantly. Sometimes, he might just confront you himself.

Make sure to never suffocate in gravel or sand, you might just no-clip unwillingly.

The Starved Stalker will eat you alive.

The Cave Dweller will lurk in the darkness and try to get you to look at him.

You might think the Nether, the Aether or the Twilight Forest will be your safe haven, but no. A few of them will get you there too. :)

The waters have become much more dangerous, creatures from Subnautica have infiltrated the waters and other evil creatures tend to lurk there too.

Weeping Angels lurk around every corner of your world. Just don't blink. ;)

Get better gear and enchantments with Tetra and Apotheosis, as you will need the gear in your great battles against all these entities!

There's many more features that are added in this modpack and I highly suggest you check it out for yourself!

Installation Guide:

CurseForge Installation:

Download and install the CurseForge launcher if you haven't already.
- Search for "From The Fog - Koitinuum Edition" in the CurseForge modpacks section.
- Click "Install" to automatically download and set up the modpack.
- Don't install Optifine, this modpack already has Embeddium.
  
  Launching the Modpack:
  - Once installed, select "From The Fog - Koitinuum Edition" from your modpack list.
  - Adjust allocated RAM in the launcher settings for optimal performance.
  - Click "Play" to embark on your terrifying journey.

Troubleshooting Guidelines:

1. Crashes and Performance:

Allocate sufficient RAM through the launcher settings.
Update Java to the latest version.
Disable resource-heavy shaders or mods if performance is an issue.

Additional Mods added to the original modpack:
Aeroblender
Aether
Aether: Enhanced Extinguishing
Aether: Gear Expansion
Aether: Lost Content
Aether: Protect Your Moa
Aether: Redux
Aether: Treasure Reforging
Aetheric Tetronomicon
Aethersteel
Amendments
Ancient Aether
Apotheosis
Apothic Amendments
Apothic Attributes
Backrooms Eternal
Bookshelf
CorgiLib
Curios
Customizable Player Models
Dark Waters
Deep Aether
Enchantment Descriptions
Enhanced Celestials
Everlasting Skins
Falling Tree
Forgematica
Forgery
Gardens of The Dead
InventoryHUD
Jade
Just Enough Items (JEI)
JustZoom
Leon's Secret Paintings
MaFgLib
Mob Sunscreen
Modernfix
mutil
Ornate Weaponry
Patchouli
Placebo
Quark
Realistic Torches
Sanity
Stalker Creepers
Structure Gel
Subnautica Flow (To add dangers to the waters)
Tetra
Tough As Nails
Upgraded Core
Vanity
Vanity: Aesthetic Armory
Vanity: Ancient Tool Variants
Vanity: Black Gold
Vanity: Bone
Vanity: Colossal Weapons
Vanity: Core
Vanity: Crucible
Vanity: Deep Forged
Vanity: Druid
Vanity: Elementals
Vanity: Helios
Vanity: Invisible Armory
Vanity: Magma
Vanity: Ornate Weaponry
Vanity: Spartan
Vanity: Spectral
Vanity: Steel
Vanity: Twilight Zone
Vanity: Viking
Vivecraft (For Those Brave Enough and Capable)
Xaero's Minimap
Xaero's Waystones Compability
Xaero's World Map
Zeta

From The Fog - Koitinuum Edition