Viace

Location
is the Mystery Merchant you will find in various locations around Val Elenium.
 * Elenea
 * Jagged Crest camp in Wyrmgorge
 * Firespine Outpost (MM discord)
 * Craterview Outpost in Sienna Canyon
 * Wyvern Watch camp
 * Field of Fire, east side, quite close to Poihon, climbing one of the giants' structures
 * southern part of Barbtail Coulee on top of cliff
 * Runner's Watch in Tor Exsul (global chat, MM discord)
 * Checkpoint Ebony in Blood Valley (MM discord)

Mystery Merchant Shop
's shop information can be found in this list here

Trivia
The only Difference in the all of Arborea's Goblin merchants in the color of their backpack. has a what color Backpack?