This guide belongs to Dulfy. All credit to her, you can visit her website for the original guide: dulfy.net
GW2 No Mask Left Behind Exalted Masks Achievement Guide in Auric Basin.
This achievement give you 25 achievements points and an Aurillium Node. This node unlocks a node in your home instance that you can mine daily in your home instance for Lump of Aurillium.
Lump of Aurillium is the currency used in Auric Basin (Tarir City, requires Exalted Acceptance mastery)in exchange for Auric Weapon recipes, Viper (Condition Dmg, Power, Condition Duration, Precision) stat inscription/insignia, runes/sigils, and cooking recipes.