Below the surface, there's a balance between the number of ores to find as well as a few changes in the mineshafts and caves you can find. Chests, mobs, and caves themselves are changed a lot so don't forget to also explore underground...
A lot of easy-to-use decorations and designs are in this pack. The usual chisel and bits, as well as a Very handy blueprint mod which helps to instantly make beautiful buildings to skip the repetition of building! Mods like more lanterns, more flowers, and lots of music discs and Macaw's extra furniture and more are included!