Xero is an NPC that is located near a wagon in Mushtown. Upon interacting with him, he will speak of a treasure that he is looking for. Shortly after, he'll claim that there is no such thing. This will trigger a Quest to find the Tablet of Xero within a nearby Chest. He will give you a riddle that goes "This old one runs forever, but never moves at all. He has not lungs nor throat, but still a mighty roaring call. Near a mushroomed town I lie, safe and dry."
Treasure Hunt: The player must find Xero's Tablet at Shiprock Bottom, located in the golden chest.
Reward: 1.1 Silver, Scroll for weapon attack (100%), and 310 xp.