12w02a

• Bedrock is now breakable using a Broken Pickaxe, and only a broken pickaxe. Trying to break it with any other tool will result in the block immediately reappearing.
• Added a new dimension, the Ghost Dimension, accessible by jumping into the void in the Overworld or End. You can leave the ghost dimension once you're inside by building up to above Y 120.
• Alongside the ghost dimension, some unused mobs were re-added. You can find them there.
• Removed Random Event 39
• Fixed some issues with the default settings.
• Removed Herobrine

In the future, the Ghost Dimension will be updated to include new memories and other neat stuff.