This mod is roughly based on a stripped down version of Valhelsia.
Major mods include Quark for general improvements,
YUNG's Better Caves and Better Mineshafts so that underground isn't boring
Alex's Mobs, Biomes O' Plenty, and Valhelsia Structures for a cool ambiance
Atum 2 for a new dimension
Astral Sorcery, Occultism, Eidolon for magic
Pam's HarvestCraft 2 and Mystical Agradditions for plants
The Endergetic Expansion, The Outer End, and End Remastered for a whole new end experience.
Create for technology
and a few others the I thought were cool.