This mod basically adds more dimensions, but it is much more. After you defeat the Enderdragon, Endermen are free of his wrath and become green-eyed enderman-like humanoids. These "green eyes" act like villagers, making villages in The End. You can trade with them. After this, you can use new blocks for new portals. To get new blocks, you must find them or loot them. From there, it is up to you to discover these dimensions, and save Minecraftia from a being so dark he's stuck in a dimension completly made of raw energy