Steel key brown is a key and reward from the Shades of Mort'ton minigame. To obtain it, the player must kill either a phrin shade or a riyl shade and then burn its remains on a pyre. The key may be used to enter the Shade Catacombs and then open the correctly coloured chest. It will open a steel-framed chest with a brown lock. If you lose your key, you will have to earn it again by playing the minigame. This type of key can only be used to open doors up to steel within the tombs.