Omega Mark XII

'''Omega Mk. XII' is an optional superboss in Final Fantasy XII''. It is the second or third toughest boss in the game depending on version (see below).

Location
Omega is located in the Great Crystal at Giruvegan and is only available to fight once all the Espers have been defeated and the Elite Mark for Yiazmat has been accepted. The player party can enter Omega's chamber in the Crystal beforehand, but it will be in a dormant state and unresponsive.

Ancient Warmech
According to the Clan Primer entry, Omega Mk. XII is a construct of machine and weaponry that was created to battle a great Wyrm (possibly the Hell Wyrm or Yiazmat) and was also given the ability to grow and evolve. It was left in the Great Crystal and allowed to grow on it's own, using the Mist at an energy source. For reasons unknown, it was forgotten about and grew much more than was probably originally planned.

Version Differences
In the Japanese and European versions of Final Fantasy XII, Omega has a little more than 10 Million HP, making him second only to Yiazmat. For the North American edition, it's HP was reduced to a mere 1 Million, less than the Hell Wyrm and even a couple of the higher Marks. Whatever the reasons for this change, Omega is still one of the toughest battles, being the only enemy at Level 99 with the highest strength, defense and magick power.