"Ghost Hunter by Ark Industries Studios" is a modpack which it is about beating the "spirit" or Herobrine with magic and technology.

With the materials you get you can built many different armors and weapons.

And you can build many redstone mashines to keep Herobrine out of your base.

Modlist:

Just Enough Items (JEI) (by mezz)
MrCrayfish's Gun Mod (by MrCrayfish)
Create Crafts & Additions (by MRHminer)
Kotlin for Forge (by thedarkcolour)
Fresh Animations (by Fresh__LX)
MrCrayfish's Furniture Mod (by MrCrayfish)
Faithful 64x (by Faithful_Team)
Create Stuff Additions (by Furti_Two)
Universal Mod Core (by cam72cam)
Waystones (by BlayTheNinth)
Track API (by cam72cam)
Jade 🔍 (by Snownee_)
Environmental (by TeamAbnormals)
Citadel (by sbom_xela)
PlayerEx (by clevernucleus)
Immersive Engineering (by BluSunrize)
Guard Villagers (by almightytallestred)
Biomes O' Plenty (by Forstride)
Bountiful (Forge) (by Ejektaflex)
Tinkers Construct (by mDiyo)
Create (by simibubi)
Dynamic Surroundings (by OreCruncher)
Additional Guns (by mrpineapppl3)
Patchouli (by Vazkii)
YUNG's Better Dungeons (Forge) (by YUNGNICKYOUNG)
Mantle (by mDiyo)
JourneyMap (by techbrew)
Timeless and Classics Guns (by TheRealClumsyAlien)
YUNG's Better Caves (Forge) (by YUNGNICKYOUNG)
Sophisticated Backpacks (by P3pp3rF1y)
Construct's Armory (by TheIllusiveC4)
Botania (by Vazkii)
The Irregular Chef! (A Farmer's Delight Add-on) (by davigjung)
Immersive Railroading (by cam72cam)
Supplementaries (by MehVahdJukaar)
Obfuscate (by MrCrayfish)
Quark (by Vazkii)
Farmer's Delight (by vectorwing)
YUNG's Better Mineshafts (Forge) (by YUNGNICKYOUNG)
Inventory HUD+ (by dmitrylovin)
YUNG's Better Strongholds (Forge) (by YUNGNICKYOUNG)
Futurepack Mod - Now with flyable Spaceships! (by Mcenderdragon)
Farmer's Respite (by lumpazl)
Iron Chests (by ProgWML6)
AutoRegLib (by Vazkii)
Blueprint (by TeamAbnormals)
Enhanced Celestials - Blood, Blue, & Harvest (Super) Moons (by Corgi_Taco)
Fast Leaf Decay (by olafskiii)
Curios API (Forge) (by TheIllusiveC4)
YUNG's Extras (Forge) (by YUNGNICKYOUNG)
The Legend of Herobrine (Forge 1.16.5) (by AlexMacLean)
Ice and Fire: Dragons (by sbom_xela)
Alex's Mobs (by sbom_xela)
Immersive Cooking (by CrimsonDragonRider)
YUNG's API (Forge) (by YUNGNICKYOUNG)
Flywheel (by jozufozu)
Create: Alloyed (by MythrilBagels)
Moonlight Lib (by MehVahdJukaar)
Placebo (by Shadows_of_Fire)