The Skylands

Adds a new Overwold like dimension that is floating islands you can access by getting any amount over 850 blocks high.

Mod (Stuff it adds)

Adds New stone (LightStone, basically normal stone but sorta blue, has a brick and smooth stone variants with walls, slabs, stairs ect. all with intutive crafting recipes (same as stone but with new lightstone)
Caelum Wood, with planks (all planks recipes, log, and leaves)
Dimension (Overworld Sky)
Biome (Skylands)
Mechanics where in the over world if you go above 850 blocks high you are taken to the sky dimension and if you go below -60 in the sky dimension you are sent back to the overworld (THE FIRST ONE ONLY WORKS IN OVERWORLD (i hope))
Helium Fruit
New potion for the effect levitation (With splash, and linger variant) made with helium fruit and Awkward potion.
Glimmerite (new ore with ingot type, armor set, block of it, and tool set) when wearing the set's boots all fall damge is taken away and when an enitiy is hit with the sword levitation is applyed (i know it doesnt work on enderdragon so i would assume it doesnt work on flying mobs not fully tested though) (only is found in the sky dimension's islands)
Thunder bush (found on sky dimension's islands)
Single Thunder Vine (Dropped when thunder bush is broken)
Thunder root (crafted with 9 " Single Thunder Vine ", will strike entities with lighting when hit with it and when eaten will strike eater with lighting but they will be mostly immune to it