Minecraft wiki entry for Development_versions, associated text: Added potion of night vision.
Potion of night vision is brewed by adding a golden carrot to an awkward potion.
Added potion of invisibility.
Potion of invisibility is brewed by adding a fermented spider eye to a potion of night vision.
Mobs do not attack players until the player bumps into them.
Potion also hides the player's name tag.