Did you wondered how nether gonna looks millions years later?
Im gonna show it to you!
New dimension can be accessed by portal, portal to cold nether should be built like nether portal but with frozen lapis blocks instead of obsidian, that made from 4 frozen lapis, frozen lapis usually can be found in overworld caves in special biome. Portal can be activated using unusual frozen lapis nugget.
All items/blocks from mod spawn in cold nether, but some of them can be crafted using packed ice or can be get using trades from villagers.
This dimension is very dark, so bring torches or night potion vision to see it, but if you want a challenge, you can try survive spawning in dimension without items!
Most often blocks in cold nether icy stone and icy granite. Icy granite is analog of dirt its main block in warm valleys. Icy stone drops normal stone and its only spawns in cold valleys or frozen overworld caves. Most often liquid in dimension is liquid nitrogen it damages 2 hearts/seconds.
Dwarf pine - new type of tree, you can get sapling smelting frozen pine sapling, that drops from frozen leaves of snowy bushes, that rarely spawn in warm valleys and it can only be grown on frozen grass.
Mobs dont spawn in this dimension, so only food resource is blue berries, they rare and spawn in warm valleys. Blue berries have 4 stages (but 2 stages is you playing before 1.2 update). You can use bonemeal to speed up blue berries, they grow only on frozen grass block too.
Ores spawn only is cold valleys biome, there spawn frozen iron, diamonds, lapis, but frozen lapis also spawns in overworld frozen caves. Coal in cold nether most rare ore, it only spawns in lava lakes that are very rare in this dimension.
In this mod have many structures, like abandoned houses. Small frozen house made of snowy bush materials and spawns in cold valleys. Small pine house more modern version of small frozen house, and spawns in warm valleys. Since 1.4.2 wells was added they spawn in warm valleys and have rarest block of mod - ice shard block.