The Depressed

This doesn't exist in real Minecraft, it's fictional.

The Depressed is the fifth dimension you'll go to after the Overworld, the Nether, the End and the Witherea. Looking at it normally, it is very black. If you have the Night Vision, Strength, Jump Boost, Healing or Resistance effect on the player it will teleport them to a different biome in the dimension known as the Healed. Once in the Healed, it's impossible to get back to the Depressed.

Generation

 * Void Stone
 * Void Log
 * Void Goo
 * Void (the sky)

Mobs

 * Ghouls
 * Withered Steve
 * Herobrine