Hecatoncheir
Hecatoncheir is Vanille’s Eidolon and he is the last Eidolon that you obtain in the game. Vanille and Fang will battle against Hecatoncheir as the team are working their way through Chapter 11 - Mah’habara Subterra.
His attacks are both physical and magic based, and they are quite strong given that they ignore any physical or magical defense that the target may possess.
Normal Mode
Hecatoncheir is a very offensively focused Eidolon that will throw strong attacks at any enemies you’re facing. He is incapable of healing Vanille though so make sure that you take care to protect her from damage while the Eidolon is unleashing its offensive capabilities.
| Ability | ATB Cost | Description |
|---|---|---|
| Pummel | 1 | Repeatedly deal physical damage to targets in range. |
| Aerial Tackle | 1 | Advance and deal physical damage to target. |
| Hurricane Kick | 1 | Deal physical damage to surrounding targets. |
| Force Projection | 1 | Deal physical damage to a distant target. |
| Quake | 4 | Deal Earth damage to targets in range. |
| Arise | Auto | Revive from KO with full HP and no status ailments. |
| Counter | Auto | Occasionally counterattack enemies after evading their attacks. |
| Looming Wrath | Auto | Attack any enemy that draws near. |
Charging the Gestalt Gauge
Helpful Hint
As a reminder, you can charge his Gestalt Gauge by utilizing the same tactics you used to charge his Gestalt Gauge during the Eidolon battle, namely:
- Yields to those who amass chain bonuses.
- Yields to those who heal the wounded.
- Yields to those who weaken and debilitate their enemies.
Start off by having Vanille apply some status ailments to the enemies to increase the damage Hecatoncheir does while also boosting the Gestalt Gauge, and then swap over to her 
Ravager role.
Gestalt Mode
Hecatoncheir, like Alexander and Brynhildr, can chain together attacks in Gestalt Mode which causes them to cost significantly less. Most of his attacks can be chained including Chain Cannons, Missile Tetrad and Piercing Ray.
| Ability | ATB Cost | Controls | Description |
|---|---|---|---|
| Chain Cannons | 1/1 |  and  |
Repeatedly fire on target with cannons; chainable by repeating input (hence second cost). |
| Missile Tetrad | 2/1 | and |
Fire four missiles in turn at targets and surrounding enemies; chainable by repeating input (hence second cost). |
| Piercing Ray | 3/1 | or and |
Blast target and interposing enemies with laser; chainable by repeating input (hence second cost). |
| Force Blasters | 4 |  |
Deal heavy damage to targets in range and launch them into the air. |
| Gaian Salvo | All |  |
Deal massive damage to all enemies. |
