Sacred Undertaking

It is widely understood that the Witch Elves, otherwise known as the Brides of Khaine, are some of the most formidable killers within the Dark Elf host. They use potions, such as the one you hold in your hand, to increase their ferocity in battle. The frenzies that result from imbibing these concoctions can last for minutes, or persist for hours. This potion, in particular, is remarkable, for the family crest of the Ragebloods is etched into the thin glass of the vial.

A quick word with the nearby guard inquiring as to Rageblood's location reveals that the witch elf went towards the Plain of Bone in search of bloody battle. Travel to the Cynathai Span warcamp and speak to Kithis Rageblood about the Rageblood Potion.