Ice Chest

The Frozen Chest is located within the Dungeon, requiring a Frozen Key to unlock. The chest has a 100% chance to contain a Staff of the Frost Hydra, a magic-based summoning weapon, as well as other miscellaneous items.

Trivia
In version 1.2.2, a dupe bug allows the player an infinite amount of Frozen Chests if he/she attempts to destroy a Crimson Chest