The Ritual of Murder

I have already obtained the Book of Moruin and the Heart of Aveliyan, two of the demanded offerings. Now the Ritual Kris of Khaine must be reforged amid the surging powers of the Isle of the Dead. I would not dare venture to the Isle, for Khaine demands my full sanity in order to receive His blessing. You may have the honor of going in my stead. Before you set foot on the Isle of the Dead, you must ward yourself. Our feeble cousins have already gone through extensive purification rituals to prepare themselves, a process for which I do not have time. Instead harness the power of their essence. If you gather enough of their ethereal breath, I am sure the protections bestowed upon you will be adequate enough.

Travel to the Sacred Fountain and collect the essence of the absolved High Elves there. Once you have gathered enough essence, jump into the Sacred Fountain and use it to bathe in its contents. Speak with Khori Razorveil in Saruthil's Wake afterwards for further instructions.