The Purest of Essences

Ah, a pawn comes to glean a bit of widsom from one far wiser. Tell me what you know of corruption, |c? I do not mean in the banal sense... I mean true corruption, corruption of the purest form to one of darkness. Such matter is capable of resistance, and to break it is to achieve a sense of ecstasy you will never comprehend. Though such power is beyond your grasp, perhaps you'd be a good pawn and help me achieve this triumph. You can feel some minor satisfaction in participating in great deeds, greater than what you are capable of.

Travel to the northern reaches of Shadowmarch and search for unicorns, particularly a majestic magehorn. Kill the magehorn for its pure essence and return to Hassia Bloodspiller in Ralkuth's Return.