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The Flower-filled Fissure is deceptively beautiful (left) but it contains something darker; Hecatoncheir (right).

Save at the Save Station and continue. When the boss battle begins, restart it and try again - when the main menu comes up, equip both girls with Bangles, and make the following Paradigms.

  1. SAB/COM

  2. SAB/SAB (default)

  3. MED/SEN

  4. RAV/COM

Eidolon Battle: Hecatoncheir

Hecatoncheir is the final Eidolon battle and is fought by Vanille and Fang in the Mah’habara Subterra’s Flower-filled Fissure as Vanille’s test of power.

Easy enough. Have Fang and Vanille spam debuffs for a steady rise in the Gestalt gauge. When it sprouts its tentacles, switch to setup to keep you healthy, then back to or until you can press Square/X to win the battle when the Gestalt gauge is full. Hecatoncheir will stand motionless for quite a while, and this is the best time to spam it with debuffs. It’ll attack a couple of times before returning to its motionless stance, and repeat the pattern.

You’ll obtain the Hecatoncheir Eidolith Key Item after the battle. Vanille’s ATB Gauge will increase by one segment, bringing her total to 4 (or 5, if you already bought the ATB node at the Crystarium).

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Guide Information
  • Publisher
    Square Enix
  • Platforms,
    Android, iOS, PC, PS3, XB 360
  • Genre
    RPG
  • Guide Release
    11 June 2015
  • Last Updated
    9 February 2021
  • Guide Author

Share this free guide:

Six people, from very different backgrounds, get thrown together in a series of tumultuous events. A Pulse fal’Cie (a demi-god) has been found in the seaside town of Bodhum, a place where the fates of everyone converge and the discovery sets in motion a chain of events that will change the world forever. An innocent fireworks display in the town soon turns nasty when government soldiers storm the peaceful celebration and commit everyone to the Purge (sending individuals “contaminated” by the Pulse fal’Cie into exile). This is where your story and legend begins. Can you fight fate?

Our guide covers everything you need to complete the game 100% including:

  • A complete walkthrough of all thirteen chapters.
  • All Cie’th stone marks and missions completed, with detailed strategies for every one.
  • Weapons and Shop lists and much more!

Coming Soon

  • A detailed guide on the optimum Crystarium paths for all characters as well as optional uses for them.
  • An upgrade guide for the most efficient way to level up your weapons to save you time and a lot of Gil.
  • Complete trophy/achievement guide.

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