A water and whirlwind spear, effective at manipulating the enemy's position.
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–In-game description
It is a silver triple pointed spear that resembles the trident of Poseidon itself, although the tips are aligned in a different way. This spear and the Sword of Poseidon are the most offensive weapons the god of the seas can offer his servants, carrying the greatest amount of physical power among them (see Stats below).
This versatile weapon can perform powerful watery bursts that both toss enemies away and heal and shield nearby allies, being recommended for those who prefer strong medium ranged attacks but also like to aid teammates in battle. A skilled warrior with a Spear of Poseidon in hand is an unstoppable flood against the enemy team.
Burst of Vindication - A medium range attack that knocks back enemies and slows them. Heals nearby teammates. After level up: Chargeable for additional damage or healing. L1 + square
Depths of Oceanus - Create a powerful shield that sends enemies flying and protects teammates. After level up: Shield grants additional health. L1 + triangle
Since the Trident of Olympus, which is Poseidon's main weapon, was only released months after the game, the many images of Poseidon in Multiplayer show him carrying a Spear of Poseidon in its place.