The Black Mushroom is a reagent for the Staff of Herding which grants you access to the secret level Whimsyshire.
This item is found in the Cathedral Level 1 in Act I. It doesn't always spawn but if you want to farm for it at the Select Quest menu take A Shattered Crown quest option. This will put you in Tristram. Take the Waypoint to the Cathedral Garden and take the nearby entrance to Leoric's Passage and from there up the stairs to Cathedral Level 1. Simply explore that level, rinse and repeat.
Other Reagents Needed
The other reagents required along with the Black Mushroom are:
- Leoric's Shinbone (db)-- Not required for the console version. Found rarely in the fireplace in Leoric's Manor, in late Act One.
- To farm for this select Quest number 9 "The Imprisoned Angel" in the Change Quest menu when you log in. Take the Waypoint to Leoric's Manor. You will have two rooms to fight from the back of the manor to reach the room with the fireplace in.
- Wirt's Bell (db)-- An Act II vendor (Squirt)sells it for 100,000 gold on her Potions and Dyes tab.
- Liquid Rainbow (db)-- Not required for the console version. Spawns in the Mysterious Cave in the Mysterious Chest in the Oasis, Act 2. Save Zaven the Alchemist and he will open the entrance to the cave. The chest is located on level one.
- Plan: Staff of Herding (db)-- To teach the recipe to Haedrig. Drops randomly from Izual, Act 4.
<item type="single">Black Mushroom</item>
Mushroom patch
Mushroom picked
Possible spawn but maps are random
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