This version is hardcore! The regular is here: Minecraft Cubed

You wake to find yourself in a plains biome. You start running to cut down some trees. You start mining, and find coal and iron. After this, you decide to go find some adventure elsewhere... and run into a glass wall. You take a closer look at things... you are in a glass cube. You mine some glass and place down cobblestone to move around the various cubes. You see a Ocean cube, Winter cube, Swamp cube, and many others. What would you say if this reality was real? Well it is. In Minecraft Cubed, there are various cubes where you must survive, thrive, and prosper. There are obsidian dungeons scattered around, and small stone cubes that contain lots of various ore. There are three types of cube:

Glass - basic, containing a biome
Mining - contains lots of ore
Dungeon - made of obsidian, contains custom mobs and loot

Can you survive in this world?

Challenges:
1) Get a Diamond pickaxe
2) Build an obsidian generator
3) Beat your first dungeon
4) Get full iron armor with diamond sword
5) Get to every biome
6) Beat all the dungeons