Zodiark, Keeper of Precepts is the hardest boss in the game and the most powerful Esper in Final Fantasy XII: The Zodiac Age.

Location:

Zodiark is in an optional area of the Henne Mines and requires the player to defeat all 10 Espers before gaining access. Once all the requirements are met talk to Geomancer Yugelu in Jahara. He’ll open the door that leads deeper into the mines.

Head into the room where you fought Tiamat and head into the exit on your right. Enemies ahead are strong but undead, making them weak against Holy and Healing magical attacks. If you have Excalibur it’ll make short work of everything in the area.

Strategy:

At the beginning of the fight, Zodiark will cast Darkja which does 8k damage, can cause Death, and Blinds the target if they survive. To avoid this have your weakest character take a dive by forcing them into battle alone. If you in with a full team you’ll likely end up dead. After this Darkja will hit for 200-3k damage and can cause Disease.

Dispel all buffs and remaining alive should take priority. Zodiark is powerful and a single Scathe could wipe your entire team in one blow. Bring 2 healers and set your main DPS with a Gambit for self-healing.

Don’t use Dark-elemental damage or he’ll use Banish Ray, which is an instant kill. If you use items that absorb Dark he’ll use Flare and if multiple enemies can be hit Scathe. All of his spells ignore Reflect and take no charge time to use. Don’t expect to exploit Zodiark’s weakness to Holy, once damaged with Holy he’ll change his weakness using Shift.

At 25% health Zodiark will start to use Great Barrier, Faith, Bravery, and Mana Spring. In addition, he’ll become impervious to damage and start to cast Darkja. If this happens, have a single member take the force of the attack until Zodiark becomes vulnerable.

At 10% Zodiark will still perform the same tactics but at a much higher rate. He’ll also activate Last Stand to reduce all damage taken. If you have your Quickenings remaining, use them.

Please check out our other guides for defeating every hidden Esper in Final Fantasy XII: The Zodiac Age:

How to Locate and Defeat Adrammelech, the Wroth
How to Locate and Defeat Zeromus, The Condemner
How to Locate and Defeat Cuchulainn, the Impure
How to Locate and Defeat Exodus the Judge-Sal
How to Locate and Defeat Zalera, the Death Seriph
How to Locate and Defeat Chaos, Walker of the Wheel
How to Locate and Defeat Ultima, the High Seraph