Illuminati

The Illuminati Is an organization of goblins in Final Fantasy XIV. Possessing a militaristic zeal in seeking and hoarding knowledge, it is said their scholarship rivals that of the nation of Sharlayan. They utterly unscrupulous, however, willing to use stolen magitek weaponry to enforce their claims with ruthless disregard for others' lives.

Version 1.0
The Illuminati are first mentioned by Mutamix Bubblypots and his followers, of which he is a former member. Disagreeing with their mindset, Mutamix elected to share knowledge of materia with the people of Eorzea.

A Realm Reborn
They are more directly involved in Patch 2.2, as part of the quest "Curds and Slay." The Illuminati besiege Brayflox Alltalks longstop in an attempt to secure a cheese recipe in her possession. The dungeon instance Brayflox Longstop (Hard) involves driving out the Illuminati military forces.

Heavensward
The Illuminati have set up a base camp at the abandoned Arkitechton in the Dravanian Hinterlands, and seem intent on monopolizing the Sharlayan relics in the abandoned city -- complete with magitek weaponry. As the Arkitechton lies along the road between Idyllshire and the Dravanian Forelands, they present a considerable hazard to those traveling to the settlement.

During the Main Scenario quests, the Warrior of Light, Alphinaud, and Y'shtola are asked by Slowfix to help out a friend who got into trouble with the Illuminati. This turns out to be none other than Brayflox -- again over the cheese recipe. The three help her drive off the assailants and guide her to Idyllshire.