The Mysterious Adventurer is a player spoof member of the Myths' Guild. He is located north-west on the guild's ground floor[UK]1st floor[US].
He wears a Black d'hide body, chaps, Dragon boots, Barrows gloves, Helm of neitiznot, amulet of fury and a Mythical cape, and wields a Zamorakian spear.
- The Mysterious Adventurer is a reference to the player named Woox, who gained popularity by being the first to defeat the Corporeal Beast solo in 2009. The equipment the Mysterious Adventurer wears, excluding the mythical cape, is the same equipment Woox used when he first defeated the Corporeal Beast solo.
- The adventurer is a possible reference to the trainer Red aswell, found on top of a mountain after finishing pokemon Gold & Silver, it represents the player character of the previous game, having achieved everything. The dialogue is the same.