Spooky October w Herobrine

Sodium, Lithium & Indium
Essentials mod so you can invite your friends
Voice chat mod
Animation mods
Texturepacks like Cubic Sun, Halloween Decorations, Fresh Animations, Glow Lichen turned Green (no more fake diamonds)
Hysteria Shaders v1.2.1 & 3 alternatives if you dont like
From the Fog, which adds Herobrine
appears slowly over time
in milestones = 3 days, 10 days, 50 days 100 days & 200 days
each milestone Achievement unlocks a new action
and for a final touch
Ender Dragon Fight Remaster mod
making the dragon an Actually threat

for those who want to challenge themselfs i recommended to
play in Hardcore for the Best Experience

Note: Herobrine appearing as a disc fragment has to do with resourcepacks
Fabric mods or From the Fog Direct Resourcepack has to be on TOP set to highest priority

Wiki page (scroll down)
https://lunareclipse.studio/creations/from-the-fog

Configure Herobrine
/function fromthefog:admin/config
for best experience turn everything on
Especially config page 6 Herobrine full access

in game enable cheats need to be turned on in order for the command to work
for hardcore you can enable cheats thru when creating a lan world

Good Luck