Kurzel wants you to use Kurzel's Blouse Scrap at the corpse of Novos the Summoner, then take the Ichor-Stained Cloth to her inside Drak'Tharon Keep.
<Kurzel rips a long strip of material from her blouse and hands it to you.>
Here, <race>, take this. Dip it in the remains of Novos the Summoner.
We're going to figure out what makes the Scourge leaders tick.