The Hydra's eye is an item dropped by hydras and the Alchemical Hydra. It can be combined with the Hydra's fang and heart to create the brimstone ring.
Much like abyssal bludgeons, players will not receive duplicate pieces until they have all three Hydra body parts. For example, if a player has obtained a Hydra's eye, they are guaranteed to get either a fang or heart next time.
A player uses the hydra body parts on each other, turning it into a brimstone ring.
When attempting to create the brimstone ring, a warning will appear in the chatbox stating that the process cannot be reversed, and a confirmation will appear afterwards asking if players would like to proceed with the combination. Should the player confirm, the chatbox will state You successfully combine the Hydra Heart, the Hydra Eye, and the Hydra Fang to create the Brimstone Ring.
- The Hydra's eye examine text is a reference to the lyrics of the song Eye of the Tiger.