Bring 8 Thorium Plated Daggers to Kalaran Windblade.
To hold the flawless flame, we will need a shaft and a casing. You must first find a suitable shaft.
The Dark Iron taskmasters and slavers of the cauldron use weapons of enchanted thorium, an extremely sturdy alloy. If you bring me eight thorium plated daggers, I can break the alloy down and reforge a shaft.