I have finished Voices in the Dark quest for the Dark brotherhood DLC on one of my character, unlocked the Blade of Woe skill in Dark Brotherhood skill line, but still cannot see it when sneaking up behind target at same elevation with prevent attack innocent turned off.
I figure something went wrong in the background on your side for that specific character, could you please verify and unlock it accordingly.
Account:
@Vrathak
character: Vrathak's Criminal Three
Thank you very much