The Frozen key is used to unlock the Frozen door leading to the Ancient Prison in the God Wars dungeon. It is assembled using four broken key pieces which are possessed by the other god factions: Saradomin, Zamorak, Bandos and Armadyl. In order to complete this key, you need access to each of the God's strongholds, requiring level 70 Strength, Agility, Ranged and Constitution necessary to obtain the key.

When first assembled, it contains 5 charges.One charge is used up when the Frozen door is opened with it, and when all charges are used, the key will disappear and the pieces will need to be searched for again. Each charge can be restored for 50,000gp by using it on a armour stand or by talking to Bob in Lumbridge. More than one key cannot be kept at once, so players who die within the Ancient Prison without keeping the key cannot reclaim their items easily.

• Frozen key piece (saradomin)
• Frozen key piece (zamorak)
• Frozen key piece (bandos)
• Frozen key piece (armadyl)