This mod pack has been made by Z_Builder a part time streamer on twitch (twitch.tv/z_builder/) and you can also follow him on twitter.
It has been designed to have longevity by having a progression through tech and magic mods to have you start out with a smeltery and then step through the levels to ultimately getting draconic weapons and transmutation tablet.
To keep you on your toes you need to watch your hunger and try not to get hurt as health regen has been slowed. Along with extra mobs so the daylight isn't completely safe.
There is plenty to do in the world with dungeons, battle towers and dimensions to visit and create.
If you find any problems/bugs with this pack please contact Z Builder on twitter