Shriekshroom

Shriekshroom is an ingredient.

Source
Shriekshroom can be purchased from vendors or obtained through drops from mobs:

Vendors
Shriekshroom can be purchased for 5 gil from the following vendors:
 * Engerrand
 * Esmenet
 * Fridurih
 * O'rhoyod
 * Pasdevillet
 * Shirakashi
 * Traveling Material Supplier

Drops
Shriekshroom can be obtained as a drop from the following mobs:
 * Demonstool
 * Divan Mold
 * Eftstool
 * Faerie Funguar
 * Forest Funguar
 * Malevolent Fungus
 * Parasite Funguar
 * Prisoner's Delight
 * Sylph Bonnet
 * Toadstool

Uses
Shriekshroom is used in crafting the following items: