Pack-J summary
A nice, light-weight vanilla plus styled, exploration-based modpack. The main focus is to make Minecraft more visually pleasing and having a bit more to explore than what vanilla offers. The generation is being enhanced through a combination of TerraForged, Biomes o' Plenty, Dynamic trees, and Better Foliage, creating both beautiful and realistic landscapes. Under the surface you can explore organic caves with new ores, biomes, mobs, and dungeons. Nether and End are overhauled and there's even one dimension added - Atum 2, which also has support for dynamic leaves. Overall this modpack adds progression (and diddiculty) to almost all aspects of the game.
Screenshots:

View at a When Dungeons Arise Dungeon through a birch forest

Diamonds!

Self-made custom dark GUI for CoFH mods to be consistent with the Unity Dark resource pack!

An embody in the nether
Modlist:
Alex's Mobs Battle Music
Abnormals Core
Alex's Mobs
Allurement
AppleSkin
Aquaculture 2
Artifacts
Astral Sorcery
Atum 2
AutoRegLib
Better Foliage
Better Title Screen
Biomes O' Plenty
Buzzier Bees
Champions
Chisel
Citadel
Clumps
CoFH Core
Collective
CTM
Controlling
Corail Woodcutter
Corpse
Creatures and Beasts
Curio of undying
Curious API
Decorative Blocks
Decorative Blocks Modded Compat
Default Options
Doggy Talents
Dragons And Pets
Dungeons Mobs
Dynamic Surroundings
Dynamic Trees
Dynamic Trees - Atum 2
Dynamic Trees - Biomes O' Plenty
Dynamic Trees - Quark
Dynamic Trees - TerraForged
Dynamic Trees +
Enchanted Book Redesign
Exotic Birds
ExpandAbility
Fairy Lights
Farmer's Delight
Farmer's Delight Cookbook Addon
GeckoLib
Hidden Recipe Book
Ice and Fire: Dragons
Illagers+
Infernal Expansion
Inventory Pets
Inventory Tweaks Renewed
Iron Chests
Jade
JEI Integration
JEI
Kotlin for Forge
Macaw's Bridges
Macaw's Paintings
MicxinBootstrap
More Snow
More Villagers
Mowzie's Mobs
Nature's Compass
Nether's Delight
Nether's Exoticism
No Default Auto-Jump
No Potion Offset
Nourished Nether
ObserverLib
Odd Water Mobs
OptiForge
Overloaded Armor Bar
Patchouli
Pokecube AIO (diasbled by default)
Polymorph
Quark
Refined Pipes
Repurposed Structures
Simply Backpacks
Sit
Skinned Lanterns
Snow Under Trees
Spiders 2.0
Step
Storage Drawers
Straw Golem Reborn
Subterranean Wilderness
Supplementaries
Swing Through Grass
TerraForged
Thermal Expansion
Thermal Foundation
Thermal Innovation
Torch Slabs Mod
Tumbleweed
Two Players One Horse
Upgrade Aquatic
Valhelsia Core
Valhelsia Structures
Void Totem
When Dungeons Arise
Xaero's Minimap
YUNG's API
YUNG's Better Caves
YUNG's Better Mineshafts
YUNG's Better Strongholds
YUNG's Extras

