Fermented Spider Eye

A fermented spider eye is a brewing ingredient in Minecraft, and it cannot be eaten directly. It is primarily used for making potions. Unlike a regular spider eye, a fermented spider eye changes the effects of potions, usually turning beneficial potions into potions with negative effects. For example, a potion of swiftness will become a potion of slowness, a potion of strength will become a potion of weakness, and a potion of healing or poison will become a potion of harming. However, there is an exception: a fermented spider eye can be combined with a potion of night vision to create a potion of invisibility, which is the only positive effect it can produce. The crafting of a fermented spider eye requires a spider eye, a brown mushroom, and sugar. These three materials can be crafted in any arrangement at a crafting table. Fermented spider eyes cannot be found in the wild; they can only be obtained through crafting, or found in the creative mode inventory. It is used to make potions of weakness, harming, slowness, and invisibility. The item ID and command for fermented spider eyes vary across different versions of the game, and it is necessary to use the correct version-specific command.