The muddy key is a key that can be used to open the Muddy chest in the centre of the Lava Maze in the Wilderness. It can be obtained as a drop from Chaos dwarves and the Crazy archaeologist. It is similar to the crystal key.
At current prices, using one muddy key yields a total value of 4,702 coins, a profit of 564 coins.
Item Quantity Rarity GE market price Uncut ruby 1 Always 1,459 Mithril bar 1 Always 713 Mithril dagger 1 Always 61 Anchovy pizza 1 Always 611 Law rune 2 Always 414 Death rune 2 Always 444 Chaos rune 10 Always 1,000