Bring the Burning Blade Medallion to Zureetha Fargaze, outside The Den.
Through my divinations, I see that an item of power hides deep within the Burning Blade Coven, guarded by beasts and black magic.
It is called the Burning Blade Medallion, and your next task is to find it and remove it from the coven.
But be wary, for the medallion may be possessed by an agent of the Burning Blade, and if so then the agent's power would be greater than the familiars you have already encountered.
Go, [player]. You will find the coven in a cave, to the north and west.