The Trident of Ankohl (as an item, it is referred to simply as the Trident) is a truly unique piece of Equipment found in Golden Sun: The Lost Age. It is needed to break Poseidon's protective barrier and allow Felix's party to battle the entity outright. It must be forged from its three prongs, which are conveniently named the Left, Center, and Right Prongs. Interestingly, an old man in Madra seems to know about the Trident, and how it's necessary to defeat Poseidon and get to Lemuria.