Where Is The Artifact In Kythera Finding The Artifact And Completing The Quest

9 October 2026 | 142

Tracking down ancient relics on the island of Kythera is one of the most intriguing storylines in Assassin's Creed Odyssey. Players visiting this sun-drenched region will quickly encounter local quests centered around powerful Isu secrets and mythological beasts. Knowing where to locate the key artifact and how to finish the accompanying questline will save you plenty of wandering time.

Beginning the Questline on Kythera Island

Your journey begins in the southern Aegean Sea on Kythera Island, where you must seek out a priestess named Dione. She initiates a series of local quests involving political intrigue and worshipers of a mysterious cult. Completing these prerequisite missions is mandatory before you can reach the final stage of finding the artifact.

As you progress through Dione's tasks, you will uncover hidden betrayal within the island's hierarchy. Paying close attention to dialogue choices and investigation clues will help you reveal the true mastermind behind the local conflict. Resolving this storyline grants you the key required to unlock the ancient cavern where the relic slumbers.

Locating the Cave of Forgotten Isle

The actual artifact is kept inside the Cave of the Forgotten Isle, situated off the coast of Kythera near the island of Theseus. You can reach this cave by sailing your ship nearby or swimming across the open waters. Upon arrival, you will notice a deep central sinkhole filled with water that leads into an underground ruin.

Dive into the sinkhole and navigate the submerged tunnels until you surface inside a massive chamber. Use the key obtained from the Kythera questline to unlock the heavy door guarding the inner sanctum. Stepping through this entrance triggers a legendary boss encounter that guards the Isu artifact.

Defeating the Boss to Retrieve the Artifact

Behind the sealed door lies the legendary Cyclops, Brontes the Thunderer, who protects the hidden artifact. Battling this massive enemy requires careful dodging and aiming ranged attacks directly at his glowing single eye. Stun the monster whenever possible to unleash your highest-damage abilities while remaining out of range of his heavy ground slams.

Once you defeat Brontes in combat, a cutscene will play showing Kassandra or Alexios extracting the ancient object. You will claim the Prize of the Cyclops, which serves as one of the key artifacts needed to seal Atlantis. Securing this relic grants substantial experience points and legendary gear to boost your character's combat capabilities.

Finalizing the Kythera Storyline

After retrieving the piece, return to the island to wrap up any remaining side activities or local objectives. Completing this quest arc not only advances the main mythical storyline but also provides valuable insights into the island's history. With the relic secured, you are one step closer to completing your overall odyssey.