Colossal Adventures

Colossal Adventures is a super expansive yet optimized modpack.   Built around tech, magic, dimensions and difficulty.  There are so many mods in this pack it would be hard to describe them all but as a few examples, forge yourself some gear with Tinkerer's Construct and work your way to the Twilight Forest where strange creatures and dungeons wait.

 

Build yourself a reactor from Extreme Reactors, forge even better tools and fight the dragons from Draconic Evolution.  Learn different spells to assist you on your way from Electroblob's Wizardry.  Daytime may be peaceful but nighttime is more dreadful in this difficulty increasing world, you might just have to do everything you can to survive.