Royal Mushroom armor is an armor set that consists of one of three helmet variants, the Royal Mushroom Chestpiece, and the Royal Mushroom Greaves. It can be crafted after defeating the Mushroom King. A full set provides the following benefits:
+7 regeneration
10 to 12 defense (depending on the helmet variant)
10% increased damage for the class that your helmet variant is focused on
5% increased critical strike chance
10% reduced mana usage and +20 max mana / 20% chance to not consume ammo / 10% increased melee speed (depending on the helmet variant)