Poseidon's Trident

The Trident is Poseidon's weapon and his symbol of power. With it, he has the ability to control the ocean. It is also said that earthquakes are caused when Poseidon strikes his trident into the ground. That is mainly why Poseidon is called " The Earthshaker " It was forged by sea demons known as Telekhines. It is a three pronged spear with energy flickering around it. To mortals, it generally appears as a surfboard or a fishing rod due to the Mist. to

Percy uses one made from water to defeat Luke Castellan in The Lightning Thief (film).