Shadowroot Sac is an Alchemical Ingredient. Combine 3 of these to create Vitriol of Shadowroot Sac, which is used to make Elixir of Viciousness.

A small sac harvested from a faintly glowing mushroom. It smells incomprehensibly vile.
Properties
Rarity: Common
Weight: 0.05 kg / 0.1 lb
Price: 14 gp
UID
ALCH_Ingredient_Mushroom_ShadowrootSacUUID
44eaf801-ed52-4322-ae70-31258dd93c82
Where to find
Can be found all throughout the Shadow-Cursed Lands.