Whastrach misidentifies the Immortal Flames as the Immortal Blades in the level 40 Blue Mage quest called Blue Gold.
Whastrach:
"Even so, the most advanced weaponry will be worth little more than scrap metal without a steady supply of ceruleum. As we speak, the Garleans and the Immortal Blades are fighting to claim the supply in northern Thanalan."