Potion of Blindness

Potion of Blindness is a potion that will create a thick block void-like fog around the player. It can be brewed by adding a Fermented Spider Eye to a Night Vision potion, or adding Ink Sac to an Akward Potion. And can be used as defense against hostile mobs, since they will be unable to find the player or what's ahead of them when a splash potion. But don't thow it too close or you will experience Blindness the same as that mob. It can be cured by drinking milk, or waiting the time that the effect lasts.

Brewing
It can be brewed in 2 ways. (Not really in Minecraft.)

Akward Potion - Golden Carrot - Fermented Spider Eye

Akward Potion - Ink Sac

Trivia

 * The Fog that appears during the effect of this potion is pitch-black instead of grey.
 * The fog that appears when you on the last layer of bedrock has similar effects to Blindness, but it doesn't actually give you the status effect.
 * Drinking Blindness, and night vision will turn your world to pitch black.
 * In vanilla, adding a Fermented Spider Eye to a Night Vision Potion turns it into a Potion of Invisibility. But with this recipe now making blindness, invisibility potions can now can be brewed only from an Invisibility Orb.