A Three-headed hydra box is a monster box containing a Three-headed hydra. Making the box will result in the player gaining 128 Monstercrafting xp and releasing it will give 2.2 xp. Making the box requires level 72 Monstercrafting. The box can be created by using five Snakeskins and 130 Monster fragments on an Empty monster box while wearing a Crafting necklace. After releasing the box in a Player-owned house a three-headed hydra will appear and attack the player instantly.