Staff of the Frost Hydra

The Hydra Staff is an item introduced in patch 1.2. It has the ability to summon a Frost Hydra for 60 seconds at the cost of 20 mana, which does between 100-135 ranged Summon damage. It has no initial summon damage and cannot move, acting as a turret. Once cast, the player can switch to another weapon and the Hydra will remain. The staff only supports one Frost Hydra at any given time, so trying to summon a second Hydra will cause the first to disappear. The Frost Hydra is useful for protecting against blood moon mobs and for dishing out extra damage to more difficult bosses. The Hydra Staff is only found in a Frozen Dungeon Chest within the Dungeon, which must be unlocked with its corresponding Dungeon Key.