Mushroom

Mushroom is a spell reagent. . While harvesting mushrooms in the wild, you may get a Fragrant Mushroom or a Giant Mushroom.

Source
Mushrooms can be harvested in the wilderness, purchased for from vendors or from mobs as drops

Vendors

 * Valus
 * Eldeir Village
 * Pyros Landing
 * Oasis
 * Black Forest Outpost
 * Belhaven

Spells
Mushroom is a reagent for the following spells:
 * Poison
 * Rock Bombardment
 * Mark
 * Cloak

Used In
Mushroom is used in the following recipes:
 * Spell scrolls for the above listed spells, through Inscription
 * Lesser Stamina Potion
 * Stamina Potion
 * Greater Stamina Potion