Draich

The ritual weapon of Khaine's annointed Executioners, each draich is hand-crafted by the armourers of Khaine's temples and may take the form of a vicious sword or a mighty axe. In fact, the word 'draich' represents the act of execution itself, and the skill of the bearer as much as the specific blade used for the ritual.

Source

 * : Warhammer Armies: Dark Elves (7th Edition)
 * : pg. 47