The golden mattock is an item reward for either watching the RuneFest 2019 streams on Twitch or redeeming a code given to attendees.
Right-clicking it has a teleport option which teleports the player to the RuneFest Treasure Island.
It can be excavated with for a Mining animation and in most locations a message "You can't find anything here. But you have a feeling something is out there..." Excavating at each of the following locations produces a medium smouldering lamp:
Obtaining a lamp produces the message: You have found a smouldering lamp! You have a feeling there are other locations you should excavate... for the first five lamps, and the sixth unlocks the Golden Mattock override with the following message: You have uncovered all of the clues! You have unlocked the Golden Mattock weapon override.
While ironmen can obtain the override, they will not get the lamp rewards.
- The golden mattock was named "dummy pickaxe" and the "excavate" option used to be called "swing" prior to a hidden update on 7 October 2019.
- At the time when the golden mattock was released, the locations at which the lamps were found were future locations of dig sites for the Archaeology skill.