Alluman

Location
is the Mystery Merchant you will find in various locations around Allemantheia Outskirts
 * Allemantheia's northwest gate (MM discord)
 * Allemantheia's northeast gate (MM discord)
 * Enlightened Union entrance between (Gold Enchanter (rip) and Broker (rip))
 * Allemantheia's outer walls, on road to Val Palrada
 * San Allema, next to oasis in southeast of Allemantheia, Demon's Wheel teleportal location
 * Western Allemantheia, along the road
 * Western Allemantheia, far south in desert, middle of nowhere
 * Western Allemantheia, along the road, just before the entrance to Westonia

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?