A frozen key piece can be obtained as an uncommon drop from any non-boss monster in the respective strongholds in the God Wars Dungeon. When the player has all four pieces they can then be joined together to create a frozen key. The finished key can then be used to enter the Ancient Prison.
Each key piece is specific to each encampment of the upper level of the dungeon.
- Frozen key piece (armadyl)
- Frozen key piece (bandos)
- Frozen key piece (saradomin)
- Frozen key piece (zamorak)