Enchanted key

This is a special key, in that it isn't only used for unlocking things. It also is used to locate what you unlock with it. It changes temperature as you move around. The warmer the key gets, the closer you are. When it gets too hot to hold, you use a spade to find a chest. Inside this chest will be a number of treasure chests which have various items. In three of them will be a Saradomin mjolnir, Guthix mjolnir, and Zamorak mjolnir. This is the only place where these three unique weapons are found. When all treasure have been found, the key will melt.

The key can be placed on the Steel key ring.