Grimoire of Gaia
My intention with this mod was to make Minecraft remain a challenge and to give it a more unique experience. Because I lack the skill in programming enhanced AI or equipment, I intended for this mod to add mobs and make the game harder while more powerful and well coded mods provide high-end enhancements to the player.
This mod is not beginner friendly. It is best used by experienced players seeking a challenge or later in the game session.
Official Wika: Link
Minecraft Forum Thread: Link