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How to Craft Fermented Spider Eye in Minecraft

Fermented Spider Eye is used to invert or corrupt potion effects, creating potions with negative effects.

Overview

Fermented Spider Eye is used to invert or corrupt potion effects, creating potions with negative effects. Fermented Spider Eye uses a shapeless recipe, so the ingredients can go in any cells of the grid as long as all of them are present. A Crafting Table gives you the full 3x3 grid, which you need for any recipe larger than 2x2. You can craft one from four planks, and most bases keep one near the furnaces.

The recipe was added in Minecraft 1.0 and still works the same way in version 1.21. Each craft yields a single Fermented Spider Eye.

The materials come together from a few sources: you will be working with spider eye (kill spiders), brown mushroom (found in dark areas), and sugar (craft from sugar cane). If any of those are not already in your stores, gather them first, because the craft itself takes only a moment once everything is in the grid. With the ingredients on hand and a Crafting Table placed, Fermented Spider Eye is one of the quicker things to add to your inventory.

Crafting Recipe

Crafting Table
Spider EyeSpider Ey...
Brown MushroomBrown Mus...
SugarSugar
Fermented Spider EyeFermented...Fermented Spider Eye

Materials Needed

ItemAmountWhere to Find
Spider Eye1Kill spiders
Brown Mushroom1Found in dark areas
Sugar1Craft from sugar cane

To make Fermented Spider Eye you will gather Spider Eye (kill spiders), Brown Mushroom (found in dark areas), and Sugar (craft from sugar cane). Lining these up before you open the Crafting Table saves a trip back to storage, especially if you plan to craft several at once.

Step-by-Step Instructions

  1. Open your Crafting Table to access the 3x3 crafting grid.
  2. Place the following items anywhere in the crafting grid: Spider Eye, Brown Mushroom, Sugar.
  3. Collect your Fermented Spider Eye from the output slot.

Tips & Notes

  • Keep the ingredients for Fermented Spider Eye in a labelled chest near your crafting area so you can remake it without hunting for materials.

Uses for Fermented Spider Eye

  • Brewing negative effect potions (Weakness, Harming, Slowness, Invisibility)

How Fermented Spider Eye Fits Your World

Food restores hunger and the saturation that quietly regenerates your health, and different foods restore very different amounts. Bread and cooked meats are reliable staples, golden carrots and steak offer the best saturation for long expeditions, and golden apples provide absorption hearts and regeneration for emergencies. Keeping a stack of a high-saturation food on your hotbar is one of the simplest ways to survive longer. For Fermented Spider Eye specifically, that means it is most valuable for brewing negative effect potions (Weakness, Harming, Slowness, Invisibility).

View detailed item stats, durability and properties for Fermented Spider Eye on the Astroworld Items Database.

Frequently Asked Questions

What do I need to craft Fermented Spider Eye?
You need 1 Spider Eye, 1 Brown Mushroom, 1 Sugar, made at a Crafting Table. Gather all of the materials first, then place them following the recipe above to produce the Fermented Spider Eye.
How many Fermented Spider Eye does the recipe produce?
The recipe produces a single Fermented Spider Eye per craft.
What is Fermented Spider Eye used for?
Fermented Spider Eye is used for brewing negative effect potions (Weakness, Harming, Slowness, Invisibility).
What version of Minecraft added Fermented Spider Eye?
Fermented Spider Eye was added in Minecraft 1.0 and works the same way in the current 1.21 release. Recipes for it are identical across Java and Bedrock Edition unless noted otherwise.

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