Collect from trash mobs you can find on the way to Lord Kargurak (Heroic)
8 Aspect of Flame from underworld guardiansNote: Be careful to pull them where their corpses can be looted; killing them on bridges may result in some corpses falling into the lava and thus non-lootable
Go back to Redwinger's Metallurgic Table of Wonder at ( -279, -516, 142 ) Copy/waypoint -279, -516, 142 (room of Ayquini the Firemind (Heroic)) and double-click it for your quest update.