In Assassin's Creed Odyssey, the protagonist uses the Spear of Leonidas to perform special abilities.
The Spear of Leonidas is an Isu artifact inherited by the game's Greek hero, Kassandra or Alexios. It is actually a broken spearhead rather than a conventional complete weapon, and it is connected to Leonidas I of Sparta. The artifact grants enhanced abilities that support stealth, combat, and exploration.
Odyssey uses the spear as both a story object and a gameplay system. The player upgrades it at the Ancient Forge on the island of Andros, unlocking stronger tiers of abilities as the story progresses.
The spear is often confused with other major artifacts in the series. The Staff of Hermes Trismegistus appears in Odyssey's wider downloadable content, while the Apple of Eden is a different type of Isu artifact frequently seen across Assassin's Creed games.