The Mirror Dimension

The Mirror Dimension would serve as a 1-1 copy of the traditional over world, but with a few key differences. The dimension would have inverted color and be upside down, meaning the world would constantly be hanging above you. And blocks that may not function in this state could simply be removed. A new mirror block would be added which allows for the crafting of the portal. The Mirror block could also be used for other cool and creative ideas. In the mirror dimension, the mobs that would normally be hostile are passive, and the passive mobs would undergo a transformation into a more monstrous form, so as to not falsely portray the mob's real life counterparts. Finally, a cool boss could be a version of Herobrine who is the mirror version of the player! All on all I think that it could add several awesome game mechanics and new blocks and gameplay. Who's with me?